{"title":"Opal","description":"\u003cp\u003eOur current selection of opal — glowing Mexican fire opal, faceted to show its orange-to-red body color, and Australian boulder opal with its natural ironstone matrix.\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","products":[{"product_id":"australian-boulder-opal-suite-matched-pair-crescent","title":"Australian Boulder Opal Suite — Matched Pair + Crescent","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA distinctive three-piece Australian boulder opal suite combining a matched pair of rounded cabochons with a larger crescent-shaped centerpiece. Natural ironstone matrix frames flashes of green, blue, yellow and orange play-of-color, giving each piece an organic pattern while the suite reads as a cohesive set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Boulder Opal Suite\u003cbr\u003eSpecies: Opal\u003cbr\u003ePieces: Three — matched pair plus crescent centerpiece\u003cbr\u003eCut: Cabochon\u003cbr\u003eCenterpiece Measurements: 36.0 × 11.3 × 4.2 mm\u003cbr\u003eMatched Pair Measurements: Approximately 15.9 × 15.0 × 5.6 mm each\u003cbr\u003eColor: Orange, green, blue and yellow play-of-color\u003cbr\u003eOrigin: Australia\u003cbr\u003eTreatment: None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProvenance \/ Collector Significance\u003c\/strong\u003e\u003cbr\u003eThe natural matrix patterns give the suite one-of-a-kind character, while the coordinated shapes make it especially appealing for a bespoke jewelry composition or as a complete collector set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eOpal requires gentler care than crystalline gemstones. Keep away from high heat, harsh chemicals and sharp impacts, and clean only with a soft damp cloth or mild soapy water.\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.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51188069728503,"sku":"OTZ-2026-00328","price":2950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-00328-boulder-opal-suite-1.jpg?v=1789851426"},{"product_id":"6-53-ct-mexican-fire-opal-triangular-modified-brilliant","title":"6.53 ct Mexican Fire Opal — Triangular Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA vivid 6.53 ct Mexican fire opal with saturated orange bodycolor and a dramatic triangular modified brilliant cut. The combination of high transparency, strong brightness and an unconventional geometric outline gives the stone a bold, contemporary collector presence.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 6.53 ct\u003cbr\u003eShape \/ Cut: Triangular Modified Brilliant\u003cbr\u003eMeasurements: 17.94 × 14.28 × 8.37 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: 44\/50 — Signature\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":51233274855671,"sku":"OTZ-2026-01745","price":7500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01745-1.jpg?v=1790712096"},{"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":"2-68-ct-mexican-fire-opal-oval-cabochon-brilliant-hybrid","title":"2.68 ct Mexican Fire Opal — Oval Cabochon-Brilliant Hybrid","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA lively 2.68 ct Mexican fire opal with a distinctive hybrid cutting style: a smoothly polished cabochon-style crown over a brilliant-cut pavilion. The result is an unusual combination of glowing bodycolor and internal light return that gives this stone a strong individual character.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 2.68 ct\u003cbr\u003eShape \/ Cut: Oval Cabochon-Brilliant Hybrid\u003cbr\u003eMeasurements: 11.11 × 9.16 × 6.50 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: 40\/50 — Distinguished\u003cbr\u003eFace-Up Performance: 90%\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 and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51234302427383,"sku":"OTZ-2026-01747","price":2500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01747-1.jpg?v=1790737044"},{"product_id":"1-80-ct-mexican-fire-opal-triangular-modified-brilliant","title":"1.80 ct Mexican Fire Opal — Triangular Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA vivid 1.80 ct Mexican fire opal with saturated orange color and an uncommon triangular modified brilliant cut. Strong face-up brightness gives the stone energetic visual appeal, while a small eye-visible feather is present and disclosed in the clarity description.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 1.80 ct\u003cbr\u003eShape \/ Cut: Triangular Modified Brilliant\u003cbr\u003eMeasurements: 9.12 × 9.02 × 6.54 mm\u003cbr\u003eOrigin: Mexico\u003cbr\u003eTreatment: None\u003cbr\u003eClarity: Small eye-visible feather\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOtzera 50: 36\/50 — Distinguished\u003cbr\u003eFace-Up Performance: 88%\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":51234302460151,"sku":"OTZ-2026-01748","price":1575.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01748-1.jpg?v=1790737054"},{"product_id":"4-53-ct-mexican-fire-opal-pear-modified-brilliant","title":"4.53 ct Mexican Fire Opal — Pear Modified Brilliant","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA bright 4.53 ct Mexican fire opal with rich orange bodycolor and an elongated pear modified brilliant cut. Strong transparency and lively face-up performance give the stone a clean, elegant presentation with substantial collector presence.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGemstone: Fire Opal\u003cbr\u003eSpecies: Opal\u003cbr\u003eWeight: 4.53 ct\u003cbr\u003eShape \/ Cut: Pear Modified Brilliant\u003cbr\u003eMeasurements: 15.42 × 11.39 × 7.10 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: 39\/50 — Distinguished\u003cbr\u003eFace-Up Performance: 85%\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 and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51234302492919,"sku":"OTZ-2026-01749","price":3225.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01749-1.jpg?v=1790737064"},{"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"},{"product_id":"3-90-ct-fire-opal-oval-modified-brilliant-cut","title":"3.90 ct Fire Opal — Oval Modified Brilliant Cut","description":"\u003ch2\u003eCollector’s Note\u003c\/h2\u003e\u003cp\u003eWarm orange color gives this 3.90 ct natural Mexican fire opal an immediate presence. Its oval modified brilliant cut brings flashes of light across the face, while a faint play-of-color appears in direct sunlight — a subtle extra detail to discover as you turn the stone. With a generous 13.06 mm length, it is an inviting choice for an opal collection or a distinctive pendant.\u003c\/p\u003e\u003ch2\u003eGemstone Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGemstone: Natural fire opal\u003c\/li\u003e\n\u003cli\u003eSpecies: Opal\u003c\/li\u003e\n\u003cli\u003eWeight: 3.90 ct\u003c\/li\u003e\n\u003cli\u003eShape \/ Cut: Oval Modified Brilliant\u003c\/li\u003e\n\u003cli\u003eMeasurements: 13.06 x 10.90 x 6.67 mm\u003c\/li\u003e\n\u003cli\u003eOrigin: Mexico\u003c\/li\u003e\n\u003cli\u003eTreatment: None\u003c\/li\u003e\n\u003cli\u003eOtzera ID: OTZ-2026-01760\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOtzera 50\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e37\/50 — Distinguished\u003c\/strong\u003e\u003cbr\u003eFace-Up Performance Index: 85%\u003c\/p\u003e\u003ch2\u003eTreatment\u003c\/h2\u003e\u003cp\u003eMexican fire opal is not treated; its glowing body color is natural.\u003c\/p\u003e\u003ch2\u003eCare\u003c\/h2\u003e\u003cp\u003eClean gently with a soft cloth and lukewarm water. Protect from hard knocks, high heat 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-2026-01760\"\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","offer_id":51502622900471,"sku":"OTZ-2026-01760","price":1495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/3.9_fire_opal_11.png?v=1793198735"},{"product_id":"4-56-ct-fire-opal-triangular-modified-brilliant-cut","title":"4.56 ct Fire Opal — Triangular Modified Brilliant Cut","description":"\u003ch2\u003eCollector’s Note\u003c\/h2\u003e\u003cp\u003eGolden-orange color meets a bold triangular silhouette in this 4.56 ct natural Mexican fire opal. The modified brilliant cut creates lively reflections within its angular outline, giving the stone a sculptural quality that stands out in a collection. Measuring over 13 mm in length, it offers striking presence for a pendant or an imaginative bespoke design.\u003c\/p\u003e\u003ch2\u003eGemstone Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGemstone: Natural fire opal\u003c\/li\u003e\n\u003cli\u003eSpecies: Opal\u003c\/li\u003e\n\u003cli\u003eWeight: 4.56 ct\u003c\/li\u003e\n\u003cli\u003eShape \/ Cut: Triangular Modified Brilliant\u003c\/li\u003e\n\u003cli\u003eMeasurements: 13.35 x 12.96 x 7.6 mm\u003c\/li\u003e\n\u003cli\u003eOrigin: Mexico\u003c\/li\u003e\n\u003cli\u003eTreatment: None\u003c\/li\u003e\n\u003cli\u003eOtzera ID: OTZ-2026-01762\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOtzera 50\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e33\/50 — Collectible\u003c\/strong\u003e\u003cbr\u003eFace-Up Performance Index: 75%\u003c\/p\u003e\u003ch2\u003eTreatment\u003c\/h2\u003e\u003cp\u003eMexican fire opal is not treated; its glowing body color is natural.\u003c\/p\u003e\u003ch2\u003eCare\u003c\/h2\u003e\u003cp\u003eClean gently with a soft cloth and lukewarm water. Protect from hard knocks, high heat 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-2026-01762\"\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","offer_id":51502639350007,"sku":"OTZ-2026-01762","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01762-1-4k.jpg?v=1793202596"}],"url":"https:\/\/otzera.com\/collections\/opal.oembed","provider":"Otzera","version":"1.0","type":"link"}