{"product_id":"semi-black-opal-and-diamond-conversion-ring-of-14k-10k-gold","title":"Semi-Black Opal and Diamond Conversion Ring of 14k \u0026 10k Gold","description":"\u003cdiv\u003eL584 Semi-Black Crystal Opal and Old European Cut Diamond Halo Cluster Ring, Converted from c. 1900 Stickpin Head: Original Oval Cabochon Natural Opal, Likely Lightning Ridge (9.57 × 6.60 × 2.68 mm, est. approx. 1.0 ct), N6 Body Tone, Semi-Translucent, Bright Non-Directional Blue-Green Mosaic Flagstone Play-of-Color with Violet Accents, Within a Halo of Sixteen Old European Cut Diamonds (Raman-Confirmed at 1332 cm⁻¹), Head c. 1900 (c. 1895–1915) in approx. 14k Gold (XRF Prongs 13.3k, Low Zn), Later Ring Mount c. 1950–1990 Joined with Cd-Bearing Solder, 9ct\/10k Gallery and Shank (XRF 9.6–10.5k, Zn 5–7.6%), 3.36 Grams\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eAn elegant ring created from a stickpin (circa 1900), featuring a captivating semi-black crystal opal (likely Lightning Ridge) with bright non0directional blue\/green mosaic flagstone play of color with violet accents surrounded by a halo of 16 old European cut diamonds.   The face of the ring is mounted in 14k gold, while the ring gallery and shank are 10k gold. \u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eThe ring face measures approximately 0.55 inches by 0.45 inches and weighs 3.37 grams. The ring is currently a size 6 but can be professionally resized for an additional charge. It remains in great antique condition.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eGemstone identification has been confirmed using Raman spectroscopy, a non-destructive analytical technique that provides a precise chemical fingerprint to verify authenticity.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eMetal authenticity has been professionally verified using XRF (X-ray fluorescence) analysis and traditional jeweler’s acid testing, confirming the 10k and 14K gold construction.\u003c\/div\u003e","brand":"Trademark Antiques","offers":[{"title":"Default Title","offer_id":50638549188673,"sku":"L584","price":4795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0445\/7909\/files\/semi-black-opal-and-diamond-conversion-ring-of-14k-10k-gold-5197809.jpg?v=1791563113","url":"https:\/\/trademarkantiques.com\/products\/semi-black-opal-and-diamond-conversion-ring-of-14k-10k-gold","provider":"Trademark Antiques","version":"1.0","type":"link"}