{"product_id":"black-opal-loose-gemstone-rainbow-fire-oval-and-pear-cut-10-20mm-october-birthstone-5-carats","title":"Black Opal Loose Gemstone ,Rainbow Fire ,Oval and Pear Cut , 10-20mm , October Birthstone 5+ Carats","description":"\u003cp\u003eFaceted Black Opals with Rainbow Fire\u003c\/p\u003e\n\u003cp\u003eMost opals are cut as smooth cabochons, so a faceted black opal is a rare and eye-catching choice. Each stone is precisely faceted to throw flashes of green, blue, red, orange, and purple against a deep, dark body. The facets add a sparkle you won’t find in a cabochon, and the color shifts with every tilt.\u003c\/p\u003e\n\u003cp\u003eOpal is a natural stone, so the fire pattern is different in every piece.\u003c\/p\u003e\n\u003cp\u003eS P E C I F I C A T I O N S\u003c\/p\u003e\n\u003cp\u003eGemstone: Black opal\u003cbr\u003eCut: Faceted\u003cbr\u003eSize range: 10-20 mm\u003cbr\u003eShapes: Oval, round, and pear\/teardrop\u003cbr\u003eColors: Multicolor flash (green, blue, orange, red, purple) over a dark body\u003cbr\u003eOrigin: Ethiopia\u003cbr\u003eTreatment: Natural, untreated\u003cbr\u003eSold: Per lot 5 carats, 10 carats, 20 carats\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003eADDITIONAL INFO\u003cbr\u003e100% Natural Gemstones with no treatment.\u003cbr\u003ePhoto are representative; purchases are filled by carat weight\u003cbr\u003eNatural stones always have minor defects and inclusions\u003cbr\u003eThese are undrilled gemstones\u003c\/p\u003e","brand":"GemmartUSA","offers":[{"title":"5 Carats","offer_id":46093675888709,"sku":"OL-60010-5","price":23.39,"currency_code":"USD","in_stock":true},{"title":"10 Carats","offer_id":46093675921477,"sku":"OL-60010-10","price":44.99,"currency_code":"USD","in_stock":true},{"title":"20 Carats","offer_id":46093675954245,"sku":"OL-60010-20","price":84.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0024\/9662\/6735\/files\/photo_2026-10-22_14-03-14.jpg?v=1792658015","url":"https:\/\/gemmartusa.com\/products\/black-opal-loose-gemstone-rainbow-fire-oval-and-pear-cut-10-20mm-october-birthstone-5-carats","provider":"GemMartUSA","version":"1.0","type":"link"}