{"product_id":"vintage-black-hills-gold-cco-solid-14k-marquise-emerald-diamond-ring-size-6-75","title":"Vintage Black Hills Gold CCO Solid 14K Marquise Emerald Diamond Ring Size 6.75","description":"\u003cp\u003eThis Black Hills Gold solid 14K gold marquise emerald and diamond ring is a striking and unusual design, marked CCO for the Coleman Company. A rich green marquise-cut emerald is set east-to-west across the top, framed on each side by a trefoil cluster of three round diamonds nestled in bright white gold, giving a lovely two-tone contrast against the warm yellow gold band. The split shoulders and softly domed mounting add a sculptural, custom feel. What makes this piece especially interesting is that it departs from the grape-and-leaf styling Black Hills Gold is best known for, making it a distinctive and hard-to-find example from this South Dakota maker. A wonderful ring for anyone who loves color, sparkle, and something truly different.\u003c\/p\u003e\n\u003cp\u003eVerifications:\u003cbr\u003eSolid 14K gold has been verified using an Auracle Gold Analyzer.\u003cbr\u003eDiamonds have been verified using a Presidium Adamas Diamond Tester, which specifically distinguishes diamonds from moissanite.\u003cbr\u003eEmerald has been verified using a Presidium Gem Tester II.\u003c\/p\u003e\n\u003cp\u003eDetails:\u003cbr\u003eBrand: Coleman Company (CCO)\u003cbr\u003eStyle: Black Hills Gold\u003cbr\u003eMetal: Solid 14K gold (yellow with white gold accents)\u003cbr\u003eItem: Ring\u003cbr\u003eCenter Stone: Marquise-cut emerald\u003cbr\u003eAccent Stones: Round diamonds in two trefoil clusters\u003cbr\u003eRing Size: 6.75\u003cbr\u003eWeight: 2.65 grams\u003cbr\u003eHallmarks: 14K and CCO\u003cbr\u003eCondition: Excellent estate condition\u003c\/p\u003e\n\u003cp\u003eFun Facts:\u003cbr\u003eThe Coleman Company crafted Black Hills Gold in South Dakota from 1984 until it closed in 2017, so its CCO-marked pieces are no longer being produced, and a gemstone design like this is an unusual departure from the maker's signature grape-and-leaf work.\u003cbr\u003eThe marquise cut was reportedly commissioned in 18th-century France by King Louis XV, who wanted a gem shaped like the smile of his companion, the Marquise de Pompadour, giving the cut both its shape and its name.\u003c\/p\u003e","brand":"Updated July 2026","offers":[{"title":"Default Title","offer_id":53483046240621,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8272\/0109\/files\/Black_Hills_Gold_CCO_solid_14K_marquise_emerald_and_diamond_ring_size_6.75.jpg?v=1783566071","url":"https:\/\/silverqueenstudio.com\/products\/vintage-black-hills-gold-cco-solid-14k-marquise-emerald-diamond-ring-size-6-75","provider":"Silver Queen Studio","version":"1.0","type":"link"}