{"product_id":"gia-cert-5-10-carat-untreated-black-opal-diamond-halo-platinum-starburst-ring","title":"GIA Cert. 5.10 Carat Untreated Black Opal Diamond Halo Platinum Starburst Ring","description":"\u003cdiv\u003eGIA-certified 5.10 carat natural black opal with no color treatment, displaying vivid full-spectrum play-of-color, set in a four-prong platinum 900 mounting within a starburst single-row round brilliant diamond halo totaling 0.77 carats.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eRing size 6.5, adjustable.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eItem Type: Cocktail \/ Statement Ring\u003c\/li\u003e\n\u003cli\u003eMetal: Platinum 900\u003c\/li\u003e\n\u003cli\u003eSize: 6.5 (adjustable)\u003c\/li\u003e\n\u003cli\u003eWeight: 7.66 grams\u003c\/li\u003e\n\u003cli\u003eRing Face: 17.7 x 15.6mm\u003c\/li\u003e\n\u003cli\u003eShank Type: Polished platinum plain shank\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eCenter Stone Details:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eType: Natural Black Opal\u003c\/li\u003e\n\u003cli\u003eForm: Oval Cabochon\u003c\/li\u003e\n\u003cli\u003eCarat: 5.10 carats\u003c\/li\u003e\n\u003cli\u003eColor Play: Vivid full-spectrum — green, blue, purple, yellow, orange\u003c\/li\u003e\n\u003cli\u003eTreatment: None (no color treatment — GIA certified)\u003c\/li\u003e\n\u003cli\u003eSetting: Four-prong platinum basket\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Certified\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eAccent Diamond Details:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eType: Natural White Diamond\u003c\/li\u003e\n\u003cli\u003eCut: Round Brilliant\u003c\/li\u003e\n\u003cli\u003eCarat: 0.77 carats total\u003c\/li\u003e\n\u003cli\u003eQuantity: 18 stones\u003c\/li\u003e\n\u003cli\u003eSetting: Individual prong-set starburst halo — large stones spaced in sunburst arrangement around opal\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eAbout The Stones:\u003c\/strong\u003e\u003c\/div\u003e\u003cdiv\u003eThis 5.10 carat GIA-certified natural black opal is an extraordinary gemological specimen — its dark body tone provides the ideal backdrop against which its play-of-color blazes with maximum intensity, displaying vivid patches of electric green, cobalt blue, violet-purple, golden yellow, and orange that shift and dance with every movement under light. Black opals are the rarest and most valuable variety of opal in the world, found almost exclusively in Lightning Ridge, New South Wales, Australia, and prized by collectors precisely because their dark body tone makes the play-of-color appear more vivid and saturated than in any other opal type. GIA certification with no color treatment confirmed is the highest standard of provenance for a natural opal, guaranteeing that the stone's spectacular color display is entirely natural and unenhanced. The 18 round brilliant diamonds totaling 0.77 carats in the starburst halo provide a sparkling white frame that intensifies the opal's color play by creating a high-contrast border of white light around the stone.\u003c\/div\u003e","brand":"ASSAY","offers":[{"title":"Default Title","offer_id":46723833626814,"sku":"GA2269","price":4984.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0508\/5724\/6910\/files\/GIA-Cert_-5_10-Carat-Untreated-Black-Opal-Diamond-Halo-Platinum-Starburst-Ring-Ring.jpg?v=1778165731","url":"https:\/\/assayjewelers.uk\/it\/products\/gia-cert-5-10-carat-untreated-black-opal-diamond-halo-platinum-starburst-ring","provider":"ASSAY","version":"1.0","type":"link"}