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from 1stdibs.com

Old European Cut Diamond Emerald Onyx Handmade Platinum Ring

View this item and discover similar engagement rings for sale at - A unique gem-set setting of emerald and onyx, encompassing a spectacular carat old european cut G-H color clarity diamond center. For such

AN ONYX AND DIAMOND BROOCH The onyx sphere flanked to either side by a pierced circular-cut diamond set motif. Art Deco or Art Deco style

A MULTI-GEM AND DIAMOND NECKLACE, BY MICHELE DELLA VALLE Designed as three pavé-set sapphire, amethyst and aquamarine fish with brilliant-cut diamond heads and onyx eyes to the spectacle-set diamond collets, coral surmount and clasp, mounted in 18k white gold

Art Deco, Onyx, Rock Crystal, and Green Tourmaline Brooch, centering a cushion-shape tourmaline measuring approx. 9.50 x 7.20 mm, the carved rock crystal body with shaped onyx back, 14kt gold and platinum mount, lg. 1 7/8 in