{"product_id":"vintage-9ct-yellow-gold-queensland-koroit-boulder-opal-ring","title":"Vintage 9ct Yellow Gold Queensland Koroit Boulder Opal Ring","description":"\u003cp\u003eThis strikingly beautiful Opal hails from Queensland Australian and is known as a Koroit Opal - see below for history.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eA large example she measures approximately 3.3cm x 1.1cm x 6mm and creates such a presence on the finger with not only her finger coverage but her stunning and intricate patterns and colours.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eCrafted from 9ct yellow gold throughout the Opal is bezel set, open backed where her colours and pattern can also be seen, to bifurcated flat shoulders and a wide flat shank.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDesirable to say the least this unique ring is a collectors dream.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003cstrong\u003eHISTORY OF KOROIT OPAL FIELD\u003cbr\u003e\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe Koroit Opal field was discovered in 1897 by Lawrence Rostron, the manager of Tillboroo Sation, Eulo.\u003cbr\u003e\u003cbr data-mce-fragment=\"1\"\u003eMining continued for a number of years mostly by syndicates until by 1905, digging approximately 150 shafts up to 15 metres deep and 472 metres of drives, finding 300 ounces of medium and 30 ounces of extra fine gem grade Opal with another one and a quarter tons of gem grade matrix.\u003cbr\u003e\u003cbr data-mce-fragment=\"1\"\u003eKoroit Opal field become dormant shortly afterwards, competing with an oversupply of Opal from Whitecliffs (NSW). Some mining resumed in 1927 until the outbreak of the second World War, where Australian Diggers were once again called to arms in service to their nation.\u003cbr\u003e\u003cbr data-mce-fragment=\"1\"\u003eMore recent mining events started again in 1972 when the popularity and profitability of the gemstone increased.\u003cbr\u003e\u003cbr data-mce-fragment=\"1\"\u003eMining in Koroit today done by either open cut large scale mining or some still prefer to underground mine, albeit a little easier utilising electric lighting, jack hammers, diggers,  boggers and mechanical hoists.\u003cbr\u003e\u003cbr data-mce-fragment=\"1\"\u003eKoroit Opal today competes with no gem, it is a stand alone brand of its own with the Koroit field and its unique characters supplying magnificent Opal to opal connoisseurs around the globe.   \u003cbr\u003e\u003cbr\u003e\u003cem\u003eCredit - https:\/\/www.qoma.org.au\/what-is-boulder-opal.htm\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003cstrong\u003eSTONES\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eKoroit Opal - Pronounced ‘Kuh - Royt’\u003cbr data-mce-fragment=\"1\"\u003e1 @ approximately 3.3cm x 1.1cm x 6mm deep\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eMEASUREMENTS\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e3.4xm x 1.2cm\u003cbr data-mce-fragment=\"1\"\u003eRise - At highest point 7mm\u003cbr data-mce-fragment=\"1\"\u003e4.0mm wide shank \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eWEIGHT\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e7.2 Grams\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eMARKS\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e375 For 9ct\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eSIZE\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eN 1\/2 or 17.3mm diameter US 7\u003cbr data-mce-fragment=\"1\"\u003eCan be resized\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eVery very good preowned condition.  No chips or scratches nor damage to Opal.  No thinning to shank.  Minor marks to gold only. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePlease note boxes are for display only unless otherwise stated.\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e    \u003cbr\u003e\u003c\/p\u003e\n\u003cstyle\u003e\u003c!--\n.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }\n--\u003e\u003c\/style\u003e\n\u003cdiv class=\"embed-container\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/mTMUco8bClk\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e","brand":"Graisons Fine Jewellery","offers":[{"title":"Default Title","offer_id":40090580123683,"sku":"","price":1574.0,"currency_code":"SGD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0267\/6097\/0275\/files\/DSC_08132_1.png?v=1690431314","url":"https:\/\/graisonsfinejewellery.com\/en-sg\/products\/vintage-9ct-yellow-gold-queensland-koroit-boulder-opal-ring","provider":"Graisons Fine Jewellery","version":"1.0","type":"link"}