{"title":"Blue Gemstones","description":"\u003cp\u003eBlue gemstones from the Otzera collection — sapphire, aquamarine and beyond, each individually evaluated on the Otzera 50 scale.\u003c\/p\u003e","products":[{"product_id":"1-27-ct-unheated-cambodian-royal-blue-sapphire","title":"1.27 ct Unheated Cambodian Royal Blue Sapphire","description":"\u003cp class=\"p1\"\u003eA richly saturated natural sapphire with an intense vivid-blue color and a refined antique oval silhouette. This 1.27-carat stone displays the deep, commanding blue associated with fine royal-blue sapphires, balanced by strong transparency and a color that comes to life in sunlight. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe sapphire was examined by Professional Gem Sciences Laboratory and identified as originating from \u003cb\u003eCambodia\u003c\/b\u003e. No gemological evidence of heat treatment was detected—an important distinction, as most sapphires in today’s market are routinely heated to improve their color or clarity. The report also awards the stone the laboratory’s special \u003cb\u003e“PGS-type Royal Blue”\u003c\/b\u003e color designation.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eGemstone Details\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eGemstone:\u003c\/b\u003e Natural Sapphire\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eMineral Species:\u003c\/b\u003e Corundum\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eWeight:\u003c\/b\u003e 1.27 carats\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eShape:\u003c\/b\u003e Oval \u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eCut:\u003c\/b\u003e Mixed cut\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Vivid Blue\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eSpecial Color Designation:\u003c\/b\u003e PGS-type Royal Blue\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eTransparency:\u003c\/b\u003e Transparent\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eClarity Grade:\u003c\/b\u003e Slightly Included\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eMeasurements:\u003c\/b\u003e 6.38 × 5.56 × 4.06 mm\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003ePolish:\u003c\/b\u003e Very Good\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eSymmetry:\u003c\/b\u003e Very Good\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eOverall Cut Grade:\u003c\/b\u003e Very Well Made\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eGeographic Origin:\u003c\/b\u003e Cambodia\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eEnhancement:\u003c\/b\u003e None — no gemological evidence of heat present\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eLaboratory:\u003c\/b\u003e Professional Gem Sciences Laboratory\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eReport Number:\u003c\/b\u003e 44080102\u003c\/li\u003e\n\u003cli class=\"li3\"\u003e\n\u003cb\u003eReport Date:\u003c\/b\u003e October 11, 2019\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p4\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eCombining vivid royal-blue color, documented Cambodian origin and an unheated condition, this sapphire offers the qualities sought by both gemstone collectors and jewelry connoisseurs. Its versatile oval shape makes it equally well suited for a custom ring or pendant, while its independent laboratory documentation provides confidence in its identity, origin and treatment status.\u003c\/p\u003e","brand":"otzera","offers":[{"title":"Default Title","offer_id":50974865490167,"sku":"7326518","price":2450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/1-27-ct-cambodian-royal-blue-sapphire-angle-2_97ec3f4f-bb46-45cf-9db6-05afdd3e6d99.jpg?v=1787653431"},{"product_id":"2-41-ct-unheated-australian-blue-sapphire","title":"2.41 ct Unheated Australian Blue Sapphire - GIA Certified","description":"\u003cp class=\"p2\"\u003e\u003cb\u003eClassic Shape - Cushion Sugarloaf Cabochon\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThis distinctive natural sapphire from Australia weighs \u003cb\u003e2.41 carats\u003c\/b\u003e and has been shaped into a beautifully sculptural \u003cb\u003ecushion shape sugarloaf cabochon\u003c\/b\u003e. Its softly rounded square outline and high-domed profile give the stone a strong visual presence while allowing its deep blue color to remain the focal point.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe sapphire is described by GIA as \u003cb\u003etransparent blue natural corundum\u003c\/b\u003e, with an Australian geographic origin. Most importantly, the report states \u003cb\u003eno indications of heating\u003c\/b\u003e—an increasingly meaningful distinction in a market where many sapphires are routinely heat treated to improve their color or clarity.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eAt \u003cb\u003e7.33 × 7.28 × 4.56 mm\u003c\/b\u003e, the stone has balanced proportions and an appealing square shape. Its sugarloaf cut gives it a smooth, architectural quality that would work beautifully in a custom ring or pendant, while also making it an interesting standalone addition to a gemstone collection.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eGemstone Details\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eGemstone:\u003c\/b\u003e Natural Sapphire\u003cbr\u003e\u003cb\u003eSpecies:\u003c\/b\u003e Natural Corundum\u003cbr\u003e\u003cb\u003eOrigin:\u003c\/b\u003e Australia\u003cbr\u003e\u003cb\u003eColor:\u003c\/b\u003e Blue\u003cbr\u003e\u003cb\u003eTransparency:\u003c\/b\u003e Transparent\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 2.41 carats\u003cbr\u003e\u003cb\u003eShape:\u003c\/b\u003e Cushion Sugarloaf Cabochon\u003cbr\u003e\u003cb\u003eMeasurements:\u003c\/b\u003e 7.33 × 7.28 × 4.56 mm\u003cbr\u003e\u003cb\u003eTreatment:\u003c\/b\u003e No indications of heating\u003cbr\u003e\u003cb\u003eCertification:\u003c\/b\u003e GIA Sapphire Origin Report No. 5201859064, dated February 1, 2020\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eOtzera Collector’s Note\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThis sapphire brings together three desirable qualities: a distinctive cabochon form, documented Australian origin, and an unheated treatment status. The result is a gemstone with both visual character and strong gemological documentation—ideal for a collector who values natural materials with an individual identity.\u003c\/p\u003e","brand":"otzera","offers":[{"title":"Default Title","offer_id":50983384285431,"sku":"3509645","price":2150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/otzera-2-41ct-australian-blue-sapphire-sugarloaf-front_b16d7dd7-5a50-4b18-a514-412a8e23d3cc.jpg?v=1789010235"},{"product_id":"2-30-ct-blue-sapphire","title":"2.30 ct Blue Sapphire","description":"\u003cp\u003eThis richly colored natural sapphire weighs \u003cstrong\u003e2.30 carats\u003c\/strong\u003e and displays a dark, slightly over-saturated blue. Cut into a classic oval mixed shape, the stone combines a refined outline with crisp faceting that draws light across its surface and emphasizes its dramatic color.\u003c\/p\u003e\n\u003cp\u003eMeasuring \u003cstrong\u003e9.08 × 6.88 × 4.32 mm\u003c\/strong\u003e, the sapphire has an attractive face-up presence and balanced proportions. \u003c\/p\u003e\n\u003cp\u003eThe stone has undergone \u003cstrong\u003eheat treatment\u003c\/strong\u003e, the widely accepted enhancement used in the sapphire market to improve color. \u003c\/p\u003e\n\u003ch3\u003eGemstone Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Blue Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.30 carats\u003cbr\u003e\u003cstrong\u003eShape:\u003c\/strong\u003e Oval Mixed Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 9.08 × 6.88 × 4.32 mm\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e Dark Blue\u003cbr\u003e\u003cstrong\u003ePolish:\u003c\/strong\u003e Very Good\u003cbr\u003e\u003cstrong\u003eSymmetry:\u003c\/strong\u003e Very Good\u003cbr\u003e\u003cstrong\u003eOverall Cut Grade:\u003c\/strong\u003e Very Well Made\u003cbr\u003e\u003cstrong\u003eEnhancement:\u003c\/strong\u003e Heat\u003cbr\u003e\u003cstrong\u003eStability:\u003c\/strong\u003e Excellent\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eOtzera Collector’s Note\u003c\/h3\u003e\n\u003cp\u003eWhile overdark and heat enhanced, this sapphire weighs over two carats making it a solid entry level sapphire for new collectors looking to build their collections.\u003c\/p\u003e","brand":"otzera","offers":[{"title":"Default Title","offer_id":50983409746167,"sku":"6230574","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/2.30sapphire6.png?v=1786018865"},{"product_id":"sapphire-otz-2026-01625","title":"2.14 ct Blue Sapphire","description":"\u003cp\u003eCool steel-blue color gives this 2.14 ct sapphire a distinctive, understated character. The stone is relatively clean to the eye and offers a substantial size at over two carats. Its cushion mixed cut shows a moderate window and some asymmetry, which are reflected in its Otzera 50 evaluation rather than hidden from view.\u003c\/p\u003e\n\n\u003cp\u003eHeat treatment is present, a standard and widely accepted practice for sapphire. For a collector, the appeal here is the combination of size, clean appearance and an unusual blue tone rather than precision cutting.\u003c\/p\u003e\n\n\u003cp\u003eOtzera 50: 28\/50 — Collectible\u003cbr\u003e\nWeight: 2.14 ct\u003cbr\u003e\nDimensions: 7.65 × 6.68 × 4.73 mm\u003cbr\u003e\nTreatment: Heat\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51034350289143,"sku":"OTZ-2026-01625","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01625-d.jpg?v=1786957880"},{"product_id":"aquamarine-otz-2026-01628","title":"3.22 ct Blue Emerald-Cut Aquamarine","description":"\u003cp\u003eBright blue color and a classic emerald cut give this 3.22 ct aquamarine a crisp, elegant look with strong face-up presence. Minor windowing and extinction, light polish issues, and a small pavilion feather are reflected in its Otzera 50 evaluation. Otzera 50: 36\/50 - Distinguished.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51034350420215,"sku":"OTZ-2026-01628","price":965.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01628-b.jpg?v=1786962925"},{"product_id":"2-32-ct-natural-green-sapphire","title":"2.32 ct Green Round Brilliant Sapphire","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eThis 2.32 ct sapphire is defined by its unusually clean appearance and precise round brilliant cutting. Its body color is predominantly green, with a subtle blue influence visible from certain angles, giving the stone a distinctive and shifting face-up character.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Green Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.32 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Round Brilliant\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 7.70-7.76 x 5.05 mm\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 33\/50 — Collectible\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 75%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eHeat treatment is documented in the current Otzera record. Geographic origin is not recorded.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51137217167607,"sku":"OTZ-2026-01640","price":890.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01640-green-sapphire-4.png?v=1789009101"},{"product_id":"1-57-ct-natural-purple-sapphire","title":"1.57 ct Unheated Sri Lankan Purple Sapphire","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\n\u003cp\u003eA lively purple sapphire with excellent clarity and the added appeal of untreated status and Sri Lankan provenance. At 1.57 carats, its oval modified brilliant cut gives the stone a bright, energetic face-up appearance, while only a minor fingerprint near the periphery is noted in the evaluation.\u003c\/p\u003e\n\u003ch3\u003eGemstone Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Purple Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.57 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Oval Modified Brilliant \u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 7.56 x 6.36 x 4.09 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Sri Lanka\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003c\/p\u003e\n\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 37\/50 — Distinguished\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 75%\u003c\/p\u003e\n\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\n\u003cp\u003eThe current Otzera record identifies this sapphire as originating from Sri Lanka and lists no treatment.\u003c\/p\u003e\n\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\n\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51137217790199,"sku":"OTZ-2026-01639","price":1560.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01639-purple-sapphire-3.png?v=1789009463"},{"product_id":"aquamarine-otz-2026-01638","title":"9.05 ct Natural Nigerian Aquamarine","description":"\u003cp\u003eCollector's Note\u003cbr\u003e\nAt 9.05 carats, this Nigerian aquamarine offers impressive presence in a cushion modified brilliant cut. Its cool blue appearance and substantial size make it an appealing collector stone with the scale to work equally well in a statement setting.\u003c\/p\u003e\n\n\u003cp\u003eGemstone Details\u003cbr\u003e\nGemstone: Natural Aquamarine\u003cbr\u003e\nSpecies: Beryl\u003cbr\u003e\nWeight: 9.05 ct\u003cbr\u003e\nShape \/ Cut: Cushion Modified Brilliant\u003cbr\u003e\nMeasurements: 15.52 x 11.70 x 8.34 mm\u003cbr\u003e\nOrigin: Nigeria\u003c\/p\u003e\n\n\u003cp\u003eO50 Collector Evaluation\u003cbr\u003e\nOtzera 50: 37\/50 — Distinguished\u003cbr\u003e\nFace-Up Performance: 68%\u003c\/p\u003e\n\n\u003cp\u003eTreatment \u0026amp; Origin Disclosure\u003cbr\u003e\nOrigin is recorded as Nigeria. No treatment information is documented in the current Otzera record.\u003c\/p\u003e\n\n\u003cp\u003eCare \u0026amp; Setting\u003cbr\u003e\nAquamarine is generally suitable for jewelry wear. Clean with warm water, mild soap and a soft brush; avoid harsh chemicals and thermal shock.\u003c\/p\u003e\n\n\u003cp\u003eDigital Gem Passport\u003cbr\u003e\nAccompanied by an Otzera Digital Gem Passport preserving its identifying details and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51138651226359,"sku":"OTZ-2026-01638","price":3150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01638-aquamarine-3.jpg?v=1789008057"},{"product_id":"blue-green-otz-2026-01646","title":"2.98 ct Namibian Blue-Green Tourmaline","description":"\u003cp\u003eCollector's Note\u003cbr\u003e\nA nearly three-carat natural tourmaline with a saturated blue-green appearance and an unusual buff-top cutting style. Its oval outline carries broad flashes of green and teal as the stone moves, while the 2.98 ct size gives it strong visual presence.\u003c\/p\u003e\n\n\u003cp\u003eGemstone Details\u003cbr\u003e\nGemstone: Natural Blue-Green Tourmaline\u003cbr\u003e\nSpecies: Natural Tourmaline\u003cbr\u003e\nWeight: 2.98 ct\u003cbr\u003e\nShape \/ Cut: Oval Buff Top Modified Brilliant Cut\u003cbr\u003e\nMeasurements: 10.00 x 8.47 x 5.87 mm\u003cbr\u003e\nOrigin: Namibia\u003cbr\u003e\nTreatment: Not documented\u003c\/p\u003e\n\n\u003cp\u003eO50 Collector Evaluation\u003cbr\u003e\nOtzera 50: 33\/50 — Collectible\u003cbr\u003e\nFace-Up Performance: 75%\u003c\/p\u003e\n\n\u003cp\u003eTreatment \u0026amp; Origin Disclosure\u003cbr\u003e\nThe current Otzera record lists Namibia as the geographic origin. No treatment or independent laboratory report is documented in the current record.\u003c\/p\u003e\n\n\u003cp\u003eCare \u0026amp; Setting\u003cbr\u003e\nTourmaline is suitable for jewelry wear with sensible care. Clean with warm water, mild soap and a soft brush; avoid sudden temperature changes and aggressive cleaning methods.\u003c\/p\u003e\n\n\u003cp\u003eDigital Gem Passport\u003cbr\u003e\nAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin and treatment disclosures, and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51150481719543,"sku":"OTZ-2026-01646","price":1290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01646-blue-green-tourmaline-1.jpg?v=1789159236"},{"product_id":"4-06-ct-ceylon-blue-sapphire-gia-origin-report","title":"4.06 ct Ceylon Blue Sapphire — GIA Origin Report","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eA substantial 4.06 ct natural blue sapphire from Sri Lanka with a classic cushion mixed cut and strong face-up presence. Its saturated blue appearance, excellent transparency and documented Ceylon origin make provenance and size meaningful parts of its collector appeal.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Blue Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Natural Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.06 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Cushion Mixed Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 9.92 × 7.16 × 5.41 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Sri Lanka (Ceylon)\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heated\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 39\/50 — Distinguished\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 80%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eGIA Sapphire Origin Report 1216818065 identifies the stone as natural corundum, blue sapphire, of Sri Lankan geographic origin, heated.\u003c\/p\u003e\u003ch3\u003eLaboratory Documentation\u003c\/h3\u003e\u003cp\u003eAccompanied by GIA Sapphire Origin Report 1216818065, dated June 30, 2021.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eSapphire is highly durable and suitable for everyday jewelry with normal care. Clean with warm water, mild soap and a soft brush.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin and treatment disclosures, and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51159530766583,"sku":"OTZ-2026-01654","price":8900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01654-ceylon-blue-sapphire-1.jpg?v=1789354081"},{"product_id":"1-20-ct-brazilian-blue-green-tourmaline","title":"1.20 ct Brazilian Blue-Green Tourmaline","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA natural blue-green tourmaline from Brazil with an oval modified brilliant cut and an attractive balance of blue and green. At 1.20 ct, its transparent appearance and lively mixed color give it an easy, versatile collector appeal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Blue-Green Tourmaline\u003cbr\u003eSpecies: Natural Tourmaline\u003cbr\u003eWeight: 1.20 ct\u003cbr\u003eShape \/ Cut: Oval Modified Brilliant Cut\u003cbr\u003eMeasurements: 7.38 × 6.14 × 3.96 mm\u003cbr\u003eOrigin: Brazil\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: 34\/50 — Collectible\u003cbr\u003eFace-Up Performance: 75%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003cbr\u003eBrazil.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eTourmaline is suitable for jewelry wear with sensible care. Clean with warm water, mild soap and a soft brush; avoid ultrasonic cleaning, harsh chemicals and sudden temperature changes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51159592698103,"sku":"OTZ-2026-01650","price":760.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01650-blue-green-tourmaline-1.jpg?v=1789355587"},{"product_id":"1-00-ct-blue-emerald-cut-sapphire","title":"1.00 ct Blue Emerald-Cut Sapphire","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eDeep blue color and the crisp geometry of an emerald cut give this 1.00 ct natural sapphire a refined, architectural look. The stone is eye-clean in normal viewing and shows brighter blue flashes as it moves, giving a compact one-carat gem strong visual character.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Blue Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.00 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Emerald Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 5.88 × 4.65 × 3.67 mm\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heated\u003cbr\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Surface abrasion from prior wear is present around the table.\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 33\/50 — Collectible\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 78%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eHeat treatment is recorded for this sapphire. No geographic origin is assigned in the current Otzera record.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eSapphire is highly durable and well suited to jewelry wear. Clean with warm water, mild soap and a soft brush.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, treatment disclosure and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51187941310711,"sku":"OTZ-2026-01660","price":725.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01660-blue-sapphire-1_1599858f-7e87-4a54-8813-359488ca87f2.jpg?v=1789877287"},{"product_id":"6-75-ct-pear-cut-tanzanite","title":"6.75 ct Pear-Cut Tanzanite","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eA substantial 6.75 ct natural tanzanite with a pear-shaped mixed cut and rich violet-blue appearance. Its generous size gives the stone strong presence, while the rounded pear outline and bright flashes across the crown make it especially suited to a statement ring or pendant.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Tanzanite\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Zoisite\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.75 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Pear Mixed Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 11.61 × 10.66 × 8.10 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Tanzania\u003cbr\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Some facet abrasion is present.\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 36\/50 — Distinguished\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 80%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eThe current Otzera record lists Tanzania as the geographic origin.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eTanzanite is best suited to thoughtful wear. Clean with warm water, mild soap and a soft brush; avoid ultrasonic cleaning, sharp impacts and sudden temperature changes.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin disclosure and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51187941736695,"sku":"OTZ-2026-01661","price":3650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01661-tanzanite-1_3b66cd36-4462-4b79-8a37-d4da55d99344.jpg?v=1789846225"},{"product_id":"1-44-ct-tanzanian-tanzanite","title":"1.44 ct Tanzanian Tanzanite","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eA lively 1.44 ct natural tanzanite from Tanzania with a classic oval modified brilliant cut and an appealing blue-violet appearance. Its transparent body and crisp oval outline make it an easy size for jewelry while retaining the distinctive color character that makes tanzanite so recognizable.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Tanzanite\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Zoisite\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.44 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Oval Modified Brilliant\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 8.35 × 6.49 × 3.99 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Tanzania\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 32\/50 — Collectible\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 70%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eThe current Otzera record lists Tanzania as the geographic origin.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eTanzanite is best suited to thoughtful wear. Clean with warm water, mild soap and a soft brush; avoid ultrasonic cleaning, sharp impacts and sudden temperature changes.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin disclosure and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51188069957879,"sku":"OTZ-2026-01664","price":425.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01664-tanzanite-1.jpg?v=1789851433"},{"product_id":"2-08-ct-tanzanian-tanzanite","title":"2.08 ct Tanzanian Tanzanite","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eA richly saturated 2.08 ct natural tanzanite with the deep blue-violet color that gives the variety its unmistakable appeal. The oval modified brilliant cut produces lively flashes across the face, while the two-carat size gives the stone a strong presence without becoming oversized for jewelry.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Tanzanite\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Zoisite\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.08 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Oval Modified Brilliant\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 8.84 × 6.82 × 4.90 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Tanzania\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 36\/50 — Distinguished\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 83%\u003c\/p\u003e\u003ch3\u003eTreatment \u0026amp; Origin Disclosure\u003c\/h3\u003e\u003cp\u003eThe current Otzera record lists Tanzania as the geographic origin.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eTanzanite is best suited to thoughtful wear. Clean with warm water, mild soap and a soft brush; avoid ultrasonic cleaning, sharp impacts and sudden temperature changes.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin disclosure and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51188425818359,"sku":"OTZ-2026-01666","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01666-tanzanite-1.jpg?v=1789856813"},{"product_id":"3-07-ct-antique-cut-aquamarine","title":"3.07 ct Antique-Cut Aquamarine","description":"\u003ch3\u003eCollector's Note\u003c\/h3\u003e\u003cp\u003eA soft, refreshing blue aquamarine with an unusual antique-style cushion mixed cut. At 3.07 ct, the stone has a generous face-up spread and the distinctive personality of an older cutting style, offering something quite different from the uniform precision of modern commercial aquamarine.\u003c\/p\u003e\u003ch3\u003eGemstone Details\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Aquamarine\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Beryl\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.07 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Cushion Mixed Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 9.01 × 8.08 × 6.24 mm\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e Light Blue\u003c\/p\u003e\u003ch3\u003eO50 Collector Evaluation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 25\/50 — Discovery\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 65%\u003c\/p\u003e\u003ch3\u003eProvenance \/ Collector Significance\u003c\/h3\u003e\u003cp\u003eThe unusual cutting style gives this stone particular collector charm. Its appeal lies in the individuality of the antique-style proportions rather than the visual uniformity of a contemporary precision cut.\u003c\/p\u003e\u003ch3\u003eCare \u0026amp; Setting\u003c\/h3\u003e\u003cp\u003eAquamarine is suitable for jewelry wear with sensible care. Clean with warm water, mild soap and a soft brush; avoid sharp impacts and harsh chemicals.\u003c\/p\u003e\u003ch3\u003eDigital Gem Passport\u003c\/h3\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, collector notes and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51188425851127,"sku":"OTZ-2026-01667","price":645.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01667-aquamarine-1.jpg?v=1789856833"},{"product_id":"2-44-ct-unheated-ceylon-blue-sapphire","title":"2.44 ct Unheated Ceylon Blue Sapphire","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA 2.44 ct natural Ceylon blue sapphire with no heat recorded in the current Otzera evaluation and an unusually broad face-up presentation for its weight. Its light-to-medium blue appearance and visible silk give it a distinctly natural character, making it an accessible option for a collector who values size, provenance and unheated status.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Blue Sapphire\u003cbr\u003e\u003cstrong\u003eSpecies:\u003c\/strong\u003e Corundum\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.44 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Oval Mixed Cut\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 10.55 × 7.22 × 3.18 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Sri Lanka (Ceylon)\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None recorded in the current Otzera evaluation\u003cbr\u003e\u003cstrong\u003eClarity:\u003c\/strong\u003e Fine loupe-visible intact needle silk\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 24\/50 — Discovery\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 43% \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCut \u0026amp; Optical Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe stone is cut unusually shallow, creating substantial central windowing. That same shallow construction gives it a notably large face-up spread for 2.44 ct. It is best suited to a collector who prioritizes unheated character and visible size over optimized light return.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment \u0026amp; Origin Disclosure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe current Otzera record lists Sri Lanka (Ceylon) as the geographic origin and no treatment. These statements are based on the current Otzera record rather than an independent laboratory origin report.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSapphire is highly durable for jewelry wear. Because of the stone's shallow profile, setting design should provide secure support around the girdle. Clean with warm water, mild soap and a soft brush.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin and treatment disclosures, cut observations and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51188916355319,"sku":"OTZ-2026-01672","price":685.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01672-unheated-blue-sapphire-1.jpg?v=1789876660"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/collections\/1.27sapphirecambodia_b4b58a19-4569-4b7d-b645-379df5034cb6.png?v=1786969643","url":"https:\/\/otzera.com\/collections\/blue-gemstones.oembed","provider":"Otzera","version":"1.0","type":"link"}