{"product_id":"opal-cabochon-freeform-cut-2-67ct","title":"Black Opal - Cabochon - Freeform Cut - 2.67ct","description":"\u003cp\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Lightning Ridge, New South Wales, Australia\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCarat Weight:\u003c\/strong\u003e 2.67ct\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate size:\u003c\/strong\u003e pending measurement\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCut:\u003c\/strong\u003e Cabochon, freeform\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e This one-of-a-kind black opal is a 2.67 carat freeform cabochon, a smooth, domed stone with an irregular rounded outline. Flashes of electric blue and violet play of colour glow against its dark body tone, the feature that defines black opal. It comes from Lightning Ridge, New South Wales, the field most famous for black opal. It is a solid opal, not a doublet or triplet, and it is natural and untreated.\u003c\/p\u003e\n\u003cp\u003eOpal is a hydrated form of silica that forms when silica-rich water settles into cracks and cavities and slowly hardens. Precious opal shows play of colour, flashes of spectral colour produced as light diffracts through tiny, regularly stacked silica spheres. Opal is softer than quartz and holds some water, so it should be protected from knocks, sudden temperature changes and harsh chemicals.\u003c\/p\u003e\n\u003cp\u003eIn crystal traditions, opal is often associated with creativity, emotional expression and inspiration. These associations come from spiritual and folk traditions rather than scientifically established properties.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChemical Composition:\u003c\/strong\u003e Hydrated silica, SiO₂·nH₂O\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMohs Hardness:\u003c\/strong\u003e 5.5–6.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None (natural, untreated)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWith this product, you will receive the actual stone shown in the photograph. We do our best to offer quality products and price them honestly. Please keep in mind that colours and details may appear slightly different in person due to lighting, photography, and screen settings, but we do our best to represent each piece accurately.\u003c\/em\u003e\u003c\/p\u003e","brand":"Australia","offers":[{"title":"Default Title","offer_id":67639820124330,"sku":null,"price":1068.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/7158\/3658\/files\/opal-cabochon-freeform-gemstone-2-67ct-01.jpg?v=1791953010","url":"https:\/\/rubblerockandgem.com\/it\/products\/opal-cabochon-freeform-cut-2-67ct","provider":"Rubble Rock And Gem","version":"1.0","type":"link"}