{"title":"Exceptional Gemstones","description":"\u003cp\u003eGemstones rated 46–50 on the Otzera 50 — our highest classification, reserved for a very small number of stones that show a rare convergence of beauty, quality and collector importance.\u003c\/p\u003e\u003cp\u003eEvery score is judged relative to the stone’s own species. \u003ca href=\"\/pages\/otzera-50\"\u003eHow the Otzera 50 works\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"9-65-ct-vivid-blue-violet-tanzanite-pgs-report","title":"9.65 ct Vivid Blue-Violet Tanzanite — PGS Report","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA nearly 10-carat tanzanite with the kind of color and presence that immediately commands attention. The stone shows a vivid blue face-up appearance with violet flashes from certain angles, excellent transparency and a completely eye-clean presentation. Its cushion mixed cut delivers strong light return and a broad, balanced face-up spread.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Tanzanite\u003cbr\u003eSpecies: Zoisite\u003cbr\u003eWeight: 9.65 ct\u003cbr\u003eShape \/ Cut: Cushion Mixed Cut \u003cbr\u003eMeasurements: 14.11 × 10.35 × 8.18 mm\u003cbr\u003eColor: Vivid Blue with Violet Flashes\u003cbr\u003eTransparency \/ Clarity: Transparent \/ Eye-Clean\u003cbr\u003eOrigin: Tanzania\u003cbr\u003eTreatment: Heated (standard for tanzanite)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50 Score: \u003cstrong\u003e46 — Exceptional\u003c\/strong\u003e\u003cbr\u003eFace-Up Performance: 93%\u003cbr\u003eThis stone stands out for its saturated color, excellent transparency, strong optical performance and substantial near-10-carat size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLaboratory Documentation\u003c\/strong\u003e\u003cbr\u003eAccompanied by Professional Gem Sciences Laboratory Report No. 43060109.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTanzanite is gently warmed after mining to bring out its blue-violet color. This has been standard practice since the gem was found in Tanzania in 1967, and it is how all tanzanite is valued. The color is permanent and stable and needs no special care.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eTanzanite should be protected from sharp impacts and sudden temperature changes. Clean with warm water, mild soap and a soft brush. Avoid ultrasonic and steam cleaning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving the gemstone's identifying details, O50 evaluation and laboratory documentation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51218068144375,"sku":"OTZ-2026-01694","price":14475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01694-tanzanite-1.jpg?v=1790484086"},{"product_id":"5-11-ct-oregon-sunstone-triangular-modified-brilliant","title":"5.11 ct Oregon Sunstone — Triangular Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAn exceptional 5.11 ct Oregon sunstone with an uncommon triangular modified brilliant cut, vivid face-up performance and unusually strong collector scale. The stone shows flashes of green at certain angles and a subtle rainbow streak from the reverse when the light catches it correctly, adding to its highly individual character.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Oregon Sunstone\u003cbr\u003eSpecies: Feldspar\u003cbr\u003eWeight: 5.11 ct\u003cbr\u003eShape \/ Cut: Triangular Modified Brilliant\u003cbr\u003eMeasurements: 13.42 × 11.78 × 7.90 mm\u003cbr\u003eOrigin: Oregon, USA\u003cbr\u003eTreatment: None\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera 50: 46\/50 — Exceptional\u003cbr\u003eFace-Up Performance: 90%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eClean with warm water, mild soap and a soft brush. Avoid sharp impacts, ultrasonic cleaning and sudden temperature changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin, treatment status and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51233274593527,"sku":"OTZ-2026-01743","price":7665.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01743-1.jpg?v=1790712071"},{"product_id":"9-10-ct-mexican-fire-opal-cushion-modified-brilliant","title":"9.10 ct Mexican Fire Opal — Cushion Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA commanding 9.10 ct Mexican fire opal with exceptionally rich orange saturation and substantial collector scale. Its broad cushion modified brilliant cut gives the color room to dominate face-up, creating the intense, glowing appearance associated with top-quality Mexican fire opal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 9.10 ct\u003cbr\u003eShape \/ Cut: Cushion Modified Brilliant\u003cbr\u003eMeasurements: 18.13 × 13.08 × 8.58 mm\u003cbr\u003eOrigin: Mexico\u003cbr\u003eTreatment: None\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera 50: 46\/50 — Exceptional\u003cbr\u003eFace-Up Performance: 90%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOpal requires gentle care. Clean with a soft damp cloth or mild soapy water; avoid ultrasonic or steam cleaning, harsh chemicals, prolonged heat and sudden temperature changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin, treatment status and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51233275019511,"sku":"OTZ-2026-01746","price":12285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01746-1.jpg?v=1790712107"},{"product_id":"9-04-ct-mexican-fire-opal-triangular-modified-brilliant","title":"9.04 ct Mexican Fire Opal — Triangular Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAn extraordinary 9.04 ct fire opal from Mexico, combining substantial size, highly saturated orange color and a distinctive triangular modified brilliant cut. The stone is recorded as loupe-clean and delivers exceptional face-up performance, making it an especially strong example for a serious fire-opal collection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 9.04 ct\u003cbr\u003eShape \/ Cut: Triangular Modified Brilliant\u003cbr\u003eMeasurements: 17.88 × 14.30 × 10.63 mm\u003cbr\u003eOrigin: Mexico\u003cbr\u003eTreatment: None\u003cbr\u003eClarity: Loupe-clean\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera 50: 46\/50 — Exceptional\u003cbr\u003eFace-Up Performance: 98%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMexican fire opal is not treated; its glowing body color is natural.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOpal requires gentle care. Clean with a soft damp cloth or mild soapy water; avoid ultrasonic or steam cleaning, harsh chemicals, prolonged heat and sudden temperature changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, origin, clarity observation and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51234302525687,"sku":"OTZ-2026-01750","price":12200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01750-1.jpg?v=1790737074"}],"url":"https:\/\/otzera.com\/collections\/o50-exceptional.oembed","provider":"Otzera","version":"1.0","type":"link"}