{"product_id":"australian-boulder-opal-oval-cabochon-25x18mm-some-opalescence","title":"Closeout Some Opalescence Australian 25mm x 18mm Oval Boulder Opal","description":"\u003cp\u003eBoulder Opal forms exclusively in Queensland, Australia, where precious opal develops as veins and patches within rugged brown ironstone boulders. Over millions of years, rainwater dissolved silica from the earth's surface and deposited it into natural cavities within the ironstone host rock. The result is a gem of exceptional durability — the ironstone backing provides natural reinforcement that makes Boulder Opal more resistant to cracks and fractures than other opal varieties.\u003c\/p\u003e\n\u003cp\u003eThis 25mm x 18mm oval Boulder Opal is graded \u003cstrong\u003eSome Opalescence\u003c\/strong\u003e, meaning it contains at least a flash of opalescence across the stone's surface. Opalescence covers approximately 1–5% of the gemstone's surface, with primary hues of purples and greens. Each stone's pattern is entirely unique, heightened by the play of opalescence within the ironstone matrix. Rough material for this stone originated near the city of Cunnamulla, Queensland.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSold by the piece.\u003c\/strong\u003e Care note: Clean with warm, soapy water only. \u003cem\u003eAvoid ultrasonic cleaners, steam cleaners, and any sudden or rapid heat changes.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Australian Boulder Opal from Queensland\u003c\/li\u003e\n\u003cli\u003eOval cabochon, 25mm x 18mm\u003c\/li\u003e\n\u003cli\u003eGraded Some Opalescence — at least a flash of opalescence present throughout\u003c\/li\u003e\n\u003cli\u003eOpalescence covers approximately 1–5% of surface area; primary hues of purple and green\u003c\/li\u003e\n\u003cli\u003eEach stone features a unique, one-of-a-kind pattern\u003c\/li\u003e\n\u003cli\u003eNatural ironstone backing provides durability and resistance to fracture\u003c\/li\u003e\n\u003cli\u003eOpaque appearance\u003c\/li\u003e\n\u003cli\u003eNo treatments applied\u003c\/li\u003e\n\u003cli\u003eRough originated near Cunnamulla, Queensland, Australia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eShape\u003c\/th\u003e\n\u003ctd\u003eOval Cabochon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003ctd\u003e25mm x 18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTransparency\u003c\/th\u003e\n\u003ctd\u003eOpaque\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTreatment\u003c\/th\u003e\n\u003ctd\u003eNone (N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eQueensland, Australia (near Cunnamulla)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpalescence Grade\u003c\/th\u003e\n\u003ctd\u003eSome Opalescence (1–5% of surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Opalescence Hues\u003c\/th\u003e\n\u003ctd\u003ePurple and Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eIndividual piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClean with warm, soapy water only.\u003c\/li\u003e\n\u003cli\u003eDo not use ultrasonic cleaners, steam cleaners, or expose to sudden or rapid heat changes.\u003c\/li\u003e\n\u003cli\u003eNatural variation in pattern and opalescence distribution should be expected — each stone is unique.\u003c\/li\u003e\n\u003cli\u003eThis is a closeout item; availability is limited.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":46612248297686,"sku":"990.318","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/990.318NEW1_thumb_83465970-f2dd-4f3b-aadd-2e20e8a82cb2.jpg?v=1747953928","url":"https:\/\/www.ottofrei.com\/products\/australian-boulder-opal-oval-cabochon-25x18mm-some-opalescence","provider":"Otto Frei","version":"1.0","type":"link"}