BLACK OPAL AND DIAMOND BROOCH in 14ct white gold, set

Antique black opal cameo set atop onyx set in platinum and 18kt white gold with diamonds. Width 1 3/8;; total weight 7.5 grams Condition: Two tight fissures in onyx at 12 and 6, perhaps intentional

A FINE ART DECO BLACK OPAL AND DIAMOND RING in white gold, set with a pear shaped cabochon opal accented by round cut diamonds, no assay marks, size I / 4.5, 3.5g.

An oval black opal with board blue/green color play, 12.10 x 9.20 mm, set horizontally in RBC diamond pave gallery, hoop, 1.65 cts. TW. 18k. Size 4 1/2. 4.0 dwt.

A pair of 14ct gold earrings set with black opal and diamond. Approx. 1/2" long

18k white gold diamond and black opal doublet pendant set with a black opal doublet measuring approx. 11mm x 8.5mm, and 45 round brilliant cut diamonds, approx .45 carat total weight, measuring approx

10k white and yellow gold pin brooch, set with a central round shaped cabochon opal, approximate total weight of opal 1.57ct, flanked by four old European cut diamonds, approximate total weight of dia

Antique Victorian Opal, diamond, enamel, and gold brooch Set with cabochon opals and rose-cut diamonds, in a swirling surround of black enamel; 1880s Yellow gold 2.75 x 1.25 in; Gross weight 12.0 dwts

Piaget 18k White Gold Black Opal Dial with Diamond Set Bezel Ladies Reference 9329A66 Case Serial 206872. 28mm including bezel. Adjustable mesh bracelet in 18k white gold measures 6 inches. Winds, set

Vintage butterfly brooch with two opal wings set on 14k white gold, 14k yellow gold and silver. Edged with small diamonds. Central body in white gold with our round diamonds and two ruby cabochon eyes

cluster brooch set with one oval cabochon cut White Opal, approximately 3.59 carats, enhanced with two pear shape cabochon cut White Opals, approximate total weight 1.09 carats, accented with 13 full

14K white gold brooch (marked) set with a triangular opal embellished on two sides with thirty-four (34) small diamonds weighing approximately 0.68ct. Weight: 7.36g.

Oval black opal weighing approx 1 carat measuring 10mm x 7mm and small round diamond set in 14K white gold pendant measuring approx 1 1/8" long with 18" 14K white gold chain, weighs 2.1dwt No Reserve

Vintage 11.0mm Tahitian Black Pearl, Pave Set Diamond and 18 Karat White Gold Frog Brooch Set with Cabochon Ruby Eyes. Pearl with good luster and polish. Stamped 18K. Measures 1" H, 3/4" W. Approx. we

10 ct. Lightning Ridge opal and diamond dinner ring set in 14K white gold mounting. Oval black opal measuring 13 mm x 10 mm x approx. 3.7 mm and containing 12 round brilliant diamonds with a total wei

white gold brooch center bezel set with one oval cabochon cut White Opal, approximately 54.80 carats, accented with 46 full cut round Diamonds [I/I-1], approximate total weight 0.48 carats, 27.1 grams

BOUCHERON, AN EXCEPTIONAL ANTIQUE ART DECO DIAMOND AND ENAMEL BROOCH in platinum and 18ct white gold, the geometric body set with old cut diamonds within two octagonal borders of black enamel, the pri

Ruby diamond opal brooch; steel and 18K yellow gold brooch with worn hallmarks; Test: white metal not gold/18K yellow gold, one oval 7x5mm opal is bezel set with small 3.5mm pearl accent set into yell

White Diamonds mounted on a Black Jade disc bound and set into a gold, scalloped back plate. Can be worn as a pendant.

An Art-Deco black onyx bow brooch ca 1930's. 14k white gold double pin back and frame. Diamonds set in platinum weighing approximately three carats total weight including center marquise cut diamond.

Large oval 14K yellow gold brooch with hidden bail on back to convert to a pendant, set with large white opal cabochon and the foliate frame set with brilliant cut white diamonds, height 2", width 1.7

17 precision cut coral, 46 precision cut black onyx accent in body and tail, pave set white diamonds, straight pin, tail is flexible, tested 14kt. white gold, length with tail 3-7/8 in., 15.4 grams Pr

Black and White Baroque Pearl, Pave Set Diamond and 18 Karat White Gold Flower Brooch. Pearls measure 12.5mm. Stamped 18K. Measures 3-1/4" H, 1" W. Approx. weight: 19.0 grams. Condition: Very good con

Nice Egyptian motif Plaque Brooch crafted in 18k white Gold, featuring the shape of two animals made from Black Onyx, on a Pave Diamonds set weighing Approx. 2.05 carats. And Accented with natural Blu

A group of Early 20th Century fourteen karat gold broochesincluding a pierced and millegrained white-topped bar brooch set with black chalcedony and a diamond; a diamond bar brooch; a starburst pendan