{"product_id":"australian-boulder-opal-cabochon-16-3ct-23x16x8mm","title":"Australian Boulder Opal Cabochon 16.3ct – 23x16x8mm","description":"\u003ch2\u003eA Gemstone Unlike Any Other\u003c\/h2\u003e\u003cp\u003eThis exceptional \u003cstrong\u003eAustralian Boulder Opal cabochon\u003c\/strong\u003e is a showcase of nature's most spectacular colour play. At \u003cstrong\u003e16.3 carats\u003c\/strong\u003e and measuring \u003cstrong\u003e23 x 16 x 8mm\u003c\/strong\u003e, it is a substantial, display-worthy stone with the vivid spectral flashes of colour that make boulder opal the most prized variety of Australian opal.\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 16.3 carats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 23mm (length) x 16mm (width) x 8mm (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 depth, durability, and a striking natural contrast\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePlay-of-Colour\u003c\/h2\u003e\u003cp\u003eBoulder Opal's defining characteristic is its \u003cstrong\u003eplay-of-colour\u003c\/strong\u003e — the phenomenon where spectral flashes of electric blue, green, gold, red, and violet dance across the stone's surface as it moves in light. No two boulder opals display the same colours or patterns, making this cabochon a genuinely one-of-a-kind gemstone.\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 host rock is left intact as part of the finished stone, providing structural strength and a beautiful natural contrast to the opal's colour. Australia produces over 95% of the world's precious opal, and boulder opal is among its rarest and most distinctive varieties.\u003c\/p\u003e\u003ch2\u003eIdeal For\u003c\/h2\u003e\u003cp\u003eThis cabochon is perfect for collectors, lapidary enthusiasts, or jewellers looking to create a bespoke, one-of-a-kind piece. Its generous size and depth make it suitable for a statement ring, pendant, or brooch setting.\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":53015884267840,"sku":"53015884267840","price":350.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/4238\/5472\/files\/17865277259377922405937665857047.jpg?v=1786527738","url":"https:\/\/milbolags.myshopify.com\/products\/australian-boulder-opal-cabochon-16-3ct-23x16x8mm","provider":"MILBO LAGS Jewellery and Gems and Fossils","version":"1.0","type":"link"}