{"product_id":"australian-boulder-opal-cabochon-20ct-23x15x7mm","title":"Australian Boulder Opal Cabochon 20ct – 23x15x7mm","description":"\u003ch2\u003eRare Australian Boulder Opal — 20 Carats of Pure Colour\u003c\/h2\u003e\u003cp\u003eThis generous \u003cstrong\u003e20 carat Australian Boulder Opal cabochon\u003c\/strong\u003e is a striking natural gemstone with the vivid, shifting play-of-colour that makes boulder opal one of the world's most coveted gems. Measuring \u003cstrong\u003e23 x 15 x 7mm\u003c\/strong\u003e, it offers excellent surface area to display its spectral colour flashes — a true collector's stone.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Boulder Opal cabochon — natural Australian opal in ironstone host rock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 carats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 23mm (length) x 15mm (width) x 7mm (depth)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut:\u003c\/strong\u003e Cabochon — smooth, domed, and polished to maximise play-of-colour\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Queensland, Australia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking:\u003c\/strong\u003e Natural ironstone matrix retained — adds structural strength and a beautiful natural contrast\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePlay-of-Colour\u003c\/h2\u003e\u003cp\u003eBoulder Opal's extraordinary \u003cstrong\u003eplay-of-colour\u003c\/strong\u003e produces flashes of electric blue, green, gold, red, and violet that shift and dance as the stone moves in light. Every boulder opal is entirely unique — no two stones share the same colour pattern or intensity.\u003c\/p\u003e\u003ch2\u003eAbout Boulder Opal\u003c\/h2\u003e\u003cp\u003eFound almost exclusively in Queensland, Australia, boulder opal forms in thin seams within ironstone boulders. The ironstone host rock is retained as part of the finished stone, providing durability and a striking natural backdrop for the opal's colour. Australia produces over 95% of the world's precious opal supply.\u003c\/p\u003e\u003ch2\u003eIdeal For\u003c\/h2\u003e\u003cp\u003eA superb choice for collectors, lapidary enthusiasts, or jewellers seeking a substantial stone for a bespoke pendant, ring, or brooch. At 20 carats, this cabochon has impressive presence and weight.\u003c\/p\u003e\u003ch2\u003eCare Instructions\u003c\/h2\u003e\u003cp\u003eOpal contains water and can crack if exposed to extreme temperature changes or prolonged dryness. Store in a padded box away from direct sunlight. Clean gently with a soft, damp cloth. Avoid ultrasonic cleaners, steam, and harsh chemicals.\u003c\/p\u003e","brand":"MILBO LAGS Jewellery and Gems","offers":[{"title":"Default Title","offer_id":53015887118656,"sku":"53015887118656","price":270.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/4238\/5472\/files\/17865278837283108190738766029094.jpg?v=1786527952","url":"https:\/\/milbolags.myshopify.com\/products\/australian-boulder-opal-cabochon-20ct-23x15x7mm","provider":"MILBO LAGS Jewellery and Gems and Fossils","version":"1.0","type":"link"}