{"title":"Tourmaline","description":"\u003cp\u003eOur current selection of tourmaline — the gemstone of almost every color. Pink, blue-green, indicolite, Namibian lagoon and watermelon stones, chosen for color and cutting.\u003c\/p\u003e\u003cp\u003eEach stone is selected individually and disclosed in full, and rated stones carry an \u003ca href=\"\/pages\/otzera-50\"\u003eOtzera 50\u003c\/a\u003e score judged against their own species.\u003c\/p\u003e\u003cp\u003eExplore our \u003ca href=\"\/collections\/paraiba-tourmaline\"\u003eParaiba tourmaline collection\u003c\/a\u003e and \u003ca href=\"\/pages\/paraiba-tourmaline\"\u003eguide to Paraiba tourmaline\u003c\/a\u003e to learn about copper-bearing blue-green varieties.\u003c\/p\u003e","products":[{"product_id":"1-71-ct-paraiba-type-tourmaline-gia-certified","title":"1.71 ct Paraiba-Type Tourmaline — GIA Report","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA lovely green-blue tourmaline with the characteristic electric color collectors associate with Paraiba-type gems. This transparent 1.71 ct oval is cut in a modified brilliant style, giving it lively face-up brilliance and a distinctive tropical blue-green appearance. GIA identifies it as a copper- and manganese-bearing tourmaline that may be called “Paraiba tourmaline” in the trade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Tourmaline\u003cbr\u003eTrade Name: Paraiba-type Tourmaline\u003cbr\u003eWeight: 1.71 ct\u003cbr\u003eShape \/ Cut: Oval Modified Brilliant Cut\u003cbr\u003eMeasurements: 8.69 × 6.16 × 4.91 mm\u003cbr\u003eColor: Green-Blue\u003cbr\u003eOrigin: Mozambique\u003cbr\u003eTreatment: Heated (standard for Paraiba tourmaline)\u003cbr\u003eOtzera ID: OTZ-2026-00325\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: 39\/50 — Distinguished\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment \u0026amp; Origin Disclosure\u003c\/strong\u003e\u003cbr\u003eCopper-bearing Paraiba tourmaline is routinely heated to clear purplish tones and reveal its vivid blue-green. The change is permanent and needs no special care. Origin is Mozambique, as indicated by GIA’s testing; it is not printed on the report because the optional origin service was not requested. GIA identifies the stone as a copper- and manganese-bearing tourmaline and states that it may be called “Paraiba tourmaline” in the trade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLaboratory Documentation\u003c\/strong\u003e\u003cbr\u003eAccompanied by GIA Tourmaline Report No. 5191602078.\u003c\/p\u003e\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 sharp impacts and sudden temperature changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, laboratory documentation and O50 evaluation.\u003c\/p\u003e","brand":"otzera","offers":[{"title":"Natural","offer_id":50920510488823,"sku":"4396751","price":4750.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/otzera-1-71ct-paraiba-tourmaline-face-up_2aaaa50d-cd2a-42ed-b759-68c6553dc540.jpg?v=1787652654"},{"product_id":"17-41-ctw-carved-watermelon-tourmaline-suite","title":"17.41 ctw Carved Watermelon Tourmaline Suite","description":"\u003cp\u003eClassic pink-to-green color zoning defines this three-piece 17.41 ctw carved watermelon tourmaline suite from Brazil. Each piece is shaped into a softly rounded leaf form and finished with a floral carving across the face, allowing the saturated pink centers and green outer bands to become part of the design.\u003c\/p\u003e\u003cp\u003eThe larger centerpiece is complemented by two smaller matching carvings, creating a balanced suite with strong visual cohesion. Viewed from the reverse, the natural color banding remains clearly visible, emphasizing the character of the original tourmaline material.\u003c\/p\u003e\u003cp\u003eFor a collector or custom jewelry project, the appeal is the combination of natural watermelon color zoning, coordinated carving and a substantial total weight across three distinctive pieces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTotal weight:\u003c\/strong\u003e 17.41 ctw\u003cbr\u003e\u003cstrong\u003eApprox. dimensions:\u003c\/strong\u003e 16.63–10.86 × 16.35–12.10 × 3.90–3.65 mm\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Brazil\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e Pink, colorless and green\u003cbr\u003e\u003cstrong\u003eTransparency \/ Clarity:\u003c\/strong\u003e Semi-transparent \/ moderately included\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eThe pink and green color zoning of watermelon tourmaline is entirely natural, and no treatment has been applied.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51131686650103,"sku":"OTZ-2026-00326","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-00326-a.jpg?v=1790652651"},{"product_id":"23-58-ct-natural-pink-tourmaline","title":"23.58 ct Natural Pink Tourmaline","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eExceptional size and vibrant pink color give this 23.58 ct natural tourmaline immediate presence. Its cushion modified brilliant cut has a broad, well-proportioned outline with strong symmetry and lively light return, while the stone presents eye-clean to the unaided eye. The combination of rich color, clarity, impressive size and energetic face-up performance makes this a standout collector gemstone and a dramatic candidate for a one-of-a-kind jewelry design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Pink Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 23.58 ct\u003cbr\u003eShape \/ Cut: Cushion Modified Brilliant\u003cbr\u003eMeasurements: 18.68 × 17.14 × 11.91 mm\u003cbr\u003eColor: Vibrant Pink\u003cbr\u003eTransparency \/ Clarity: Transparent \/ Eye-clean\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: 41\/50 — Signature\u003cbr\u003eFace-Up Performance: 85%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eClean with warm water, mild soap and a soft brush. Avoid sharp impacts or aggressive ultrasonic cleaning unless first examined by a qualified jeweler.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eOtzera ID: OTZ-2026-01635\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51135147213047,"sku":"OTZ-2026-01635","price":8050.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01635-d_fa30f4b4-e78d-4f9c-bae4-b678f7924bcc.jpg?v=1788979345"},{"product_id":"blue-green-otz-2026-01646","title":"2.98 ct Namibian Lagoon Tourmaline","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA nearly three-carat natural Lagoon 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 in the light, while the 2.98 ct size gives it strong visual presence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Lagoon Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 2.98 ct\u003cbr\u003eShape \/ Cut: Oval Buff Top Modified Brilliant Cut\u003cbr\u003eMeasurements: 10.00 × 8.47 × 5.87 mm\u003cbr\u003eOrigin: Namibia\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: 33\/50 — Collectible\u003cbr\u003eFace-Up Performance: 75%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\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 sudden temperature changes and aggressive cleaning methods.\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":51150481719543,"sku":"OTZ-2026-01646","price":2980.0,"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":"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\u003cbr\u003eTreatment: None\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\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\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":"38-60-ctw-carved-watermelon-tourmaline-suite","title":"38.60 ctw Carved Watermelon Tourmaline Suite","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA dramatic five-piece suite of watermelon tourmaline carved into stylized slice forms, each preserving vivid pink-to-green zoning. The geometric carved surfaces catch the light and emphasize the saturated pink centers while green edges frame the group. At 38.60 carats total weight, the set has substantial presence for a collector, designer, or coordinated jewelry project.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Watermelon Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eTotal Weight: 38.60 ctw\u003cbr\u003ePieces: 5\u003cbr\u003eShape \/ Cut: Carved Watermelon-Slice Forms\u003cbr\u003eRecorded Dimensions: 27.1 × 13.23 × 3.0 mm\u003cbr\u003eColor: Rich Pink and Green\u003cbr\u003eTransparency: Semi-Transparent\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eThe pink and green color zoning of watermelon tourmaline is entirely natural, and no treatment has been applied.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eClean with warm water, mild soap and a soft brush. Avoid aggressive ultrasonic or steam cleaning and protect the carved edges from sharp impacts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving the suite's identifying details and permanent Otzera record.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51218057101559,"sku":"OTZ-2026-00329","price":2000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-00329-watermelon-tourmaline-suite-1.jpg?v=1790371391"},{"product_id":"7-65-ct-brazilian-watermelon-tourmaline-slice","title":"7.65 ct Brazilian Watermelon Tourmaline Slice","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA classic natural watermelon tourmaline slice displaying strong concentric zoning: a saturated pink center framed by a lighter transition and vivid green outer rim. Its thin profile and near-round crystal cross-section make the natural growth pattern especially easy to appreciate face-up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Watermelon Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 7.65 ct\u003cbr\u003eShape \/ Cut: Polished Crystal Slice\u003cbr\u003eMeasurements: 15.0 × 14.0 × 3.1 mm\u003cbr\u003eColor: Rich Pink and Green\u003cbr\u003eTransparency: Transparent\u003cbr\u003eOrigin: Brazil \u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eThe pink and green color zoning of watermelon tourmaline is entirely natural, and no treatment has been applied.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eClean with warm water, mild soap and a soft brush. Avoid aggressive ultrasonic or steam cleaning and protect the thin crystal edges from sharp impacts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving the stone's identifying details and permanent Otzera record.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51218057560311,"sku":"OTZ-2026-00330","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-00330-watermelon-tourmaline-1.jpg?v=1790374822"},{"product_id":"1-10-ct-watermelon-tourmaline-emerald-cut","title":"1.10 ct Watermelon Tourmaline — Emerald Cut","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA distinctive watermelon tourmaline with a strong pink body color contrasted by a concentrated green zone along one side. The emerald cut gives the stone a clean geometric outline while preserving the natural bicolor character that makes watermelon tourmaline so collectible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Watermelon Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 1.10 ct\u003cbr\u003eShape \/ Cut: Emerald Cut\u003cbr\u003eMeasurements: 7.34 × 5.18 × 3.23 mm\u003cbr\u003eColor: Pink and Green Bicolor\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eThe pink and green color zoning of watermelon tourmaline is entirely natural, and no treatment has been applied.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eClean with warm water, mild soap and a soft brush. Avoid sharp impacts, ultrasonic cleaning 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 the stone's identifying details and permanent Otzera record.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51218238898423,"sku":"OTZ-2026-00331","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-00331-watermelon-tourmaline-1.jpg?v=1790374871"},{"product_id":"6-48-ct-nigerian-gray-tourmaline-precision-round-cut","title":"6.48 ct Nigerian Gray Tourmaline — Precision Round Cut","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eAn unusually colored Nigerian tourmaline with a predominantly gray body color and subtle green flashes as the stone moves. The precision round modified brilliant cut produces a crisp, symmetrical face-up pattern and strong optical performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eGemstone:\u003c\/strong\u003e Tourmaline\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.48 ct\u003cbr\u003e\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Round Modified Brilliant\u003cbr\u003e\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 12.08–12.05 × 7.67 mm\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e Gray with faint green hints\u003cbr\u003e\u003cstrong\u003eTransparency:\u003c\/strong\u003e Transparent\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e Nigeria\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eOtzera 50:\u003c\/strong\u003e 34\/50 — Collectible\u003cbr\u003e\u003cstrong\u003eFace-Up Performance:\u003c\/strong\u003e 78%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eTourmaline is suitable for jewelry wear with reasonable care. Clean with warm water, mild soap and a soft brush; avoid sharp impacts 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 the gemstone's identifying details and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51221946892535,"sku":"OTZ-2026-01679","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01679-tourmaline-1.jpg?v=1790463745"},{"product_id":"1-71-ct-nigerian-pink-tourmaline-radiant-cut","title":"1.71 ct Nigerian Pink Tourmaline — Radiant Cut","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA vivid pink Nigerian tourmaline with excellent saturation and a crisp radiant cut. At 1.71 carats, the stone combines strong color with an attractive near-square outline and lively face-up performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Pink Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 1.71 ct\u003cbr\u003eShape \/ Cut: Radiant Cut\u003cbr\u003eMeasurements: 6.85 × 6.33 × 5.21 mm\u003cbr\u003eColor: Vivid Pink\u003cbr\u003eOrigin: Nigeria\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: \u003cstrong\u003e37 — Distinguished\u003c\/strong\u003e\u003cbr\u003eFace-Up Performance: 88%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003cbr\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eTourmaline is suitable for jewelry wear with reasonable care. Clean with warm water, mild soap and a soft brush; avoid sharp impacts 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 the gemstone's identifying details, origin and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51222638625015,"sku":"OTZ-2026-01720","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01720-pink-tourmaline-3.jpg?v=1790479902"},{"product_id":"10-14-ct-indicolite-tourmaline","title":"10.14 ct Indicolite Tourmaline","description":"\u003cp\u003e\u003cstrong\u003eCollector’s Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA substantial 10.14-carat indicolite tourmaline with a deep blue-green appearance. Its large size and moody teal coloration give it a distinctive presence for collectors drawn to darker, strongly individual tourmalines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Indicolite Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 10.14 ct\u003cbr\u003eDimensions: 13.49 × 11.88 × 7.77 mm\u003cbr\u003eTreatment: None\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eO50 Score: 28\/50 — Collectible\u003cbr\u003eFace-Up Performance: 48%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera ID: OTZ-2026-01737\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51229570531575,"sku":"OTZ-2026-01737","price":1950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01737-1.jpg?v=1790650344"},{"product_id":"4-35-ct-yellow-tourmaline-round-modified-brilliant","title":"4.35 ct Yellow Tourmaline — Round Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA precisely fashioned 4.35 ct yellow tourmaline with an unusual warm champagne-gold color and a highly symmetrical round modified brilliant cut. The precision manufacturing and uncommon color expression give this stone a particularly refined collector presence.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Yellow Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eWeight: 4.35 ct\u003cbr\u003eShape \/ Cut: Round Modified Brilliant\u003cbr\u003eMeasurements: 9.68–9.62 × 7.47 mm\u003cbr\u003eTreatment: None\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera 50: 38\/50 — Distinguished\u003cbr\u003eFace-Up Performance: 85%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\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, steam 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 and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51231836602615,"sku":"OTZ-2026-01726","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01726-1.jpg?v=1790698863"},{"product_id":"15-45-ctw-brazilian-watermelon-tourmaline-pair","title":"15.45 ctw Brazilian Watermelon Tourmaline Pair","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA sweet and highly graphic matched pair of Brazilian watermelon tourmaline slices totaling 15.45 carats. Each piece shows a vivid pink outer band surrounding a softer green center, creating a playful natural color contrast that is especially appealing as a coordinated pair.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Watermelon Tourmaline\u003cbr\u003eSpecies: Tourmaline\u003cbr\u003eTotal Weight: 15.45 ctw\u003cbr\u003eConfiguration: Pair\u003cbr\u003eShape \/ Cut: Carved Slices\u003cbr\u003eMeasurements: 14.89 × 14.64 × 3.40 mm\u003cbr\u003eColor: Bicolor Pink and Green\u003cbr\u003eTransparency: Transparent\u003cbr\u003eOrigin: Brazil\u003cbr\u003eTreatment: None\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe pink and green color zoning of watermelon tourmaline is entirely natural, and no treatment has been applied.\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 ultrasonic or steam cleaning and protect the thin carved edges from sharp impacts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAccompanied by an Otzera Digital Gem Passport preserving the pair's identifying details and permanent Otzera record.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51231836668151,"sku":"OTZ-2026-00334","price":1495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/15.45_Watermelon_Tourmaline_pair_1.jpg?v=1790702001"},{"product_id":"4-33-ct-pink-tourmaline-oval-mixed-cut","title":"4.33 ct Pink Tourmaline — Oval Mixed Cut","description":"\u003ch2\u003eCollector’s Note\u003c\/h2\u003e\u003cp\u003eRich raspberry-pink color gives this 4.33 ct natural tourmaline a vivid personality. The oval mixed cut reveals bright pink reflections around a generous central face, while its clear appearance makes the faceting a pleasure to explore. At 10.75 mm long, it has the presence to anchor a bespoke jewel and the color to become a memorable part of a collection.\u003c\/p\u003e\u003ch2\u003eGemstone Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGemstone: Natural pink tourmaline\u003c\/li\u003e\n\u003cli\u003eSpecies: Tourmaline\u003c\/li\u003e\n\u003cli\u003eWeight: 4.33 ct\u003c\/li\u003e\n\u003cli\u003eShape \/ Cut: Oval Mixed Cut\u003c\/li\u003e\n\u003cli\u003eMeasurements: 10.75 x 8.35 x 6.9 mm\u003c\/li\u003e\n\u003cli\u003eTreatment: None\u003c\/li\u003e\n\u003cli\u003eOtzera ID: OTZ-2026-01771\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOtzera 50\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e30\/50 — Collectible\u003c\/strong\u003e\u003cbr\u003eFace-Up Performance Index: 70%\u003c\/p\u003e\u003ch2\u003eTreatment\u003c\/h2\u003e\u003cp\u003eTourmaline comes in more colors than almost any other gem, and this stone’s color is natural.\u003c\/p\u003e\u003ch2\u003eCare\u003c\/h2\u003e\u003cp\u003eClean with lukewarm water, mild soap and a soft brush. Protect from hard knocks and sudden temperature changes. Avoid steam and ultrasonic cleaning.\u003c\/p\u003e\u003cp\u003ePhotographs show this individual gemstone. Color may vary with lighting and screen settings.\u003c\/p\u003e\u003ch2\u003eDigital Gem Passport\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/otzera.com\/pages\/passport\/otz-2026-01771\"\u003eView this gemstone’s Digital Gem Passport\u003c\/a\u003e for its permanent record and Otzera 50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51504040313079,"sku":"OTZ-2026-01771","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01771-1-4k.jpg?v=1793202595"}],"url":"https:\/\/otzera.com\/collections\/tourmaline.oembed","provider":"Otzera","version":"1.0","type":"link"}