A ROUND CABOCHON BLACK OPAL, 5.48 carat approximately.

comprising one pair with two round cabochon cut semi-black opals at approximately 0.90 carats total (1.1 grams); one pair with two oval cabochon cut white opals at approximately 0.40 carats total (0.9

BLACK OPAL AND DIAMOND RING Containing one oval cabochon black opal measuring approximately 15.00 x 13.00 mm and 40 round brilliant cut diamonds weighing approximately 0.40 carat total. Mounted in yel

BLACK OPAL AND DIAMOND RING Containing one oval cabochon black opal measuring 10.85 x 9.00 mm and 12 round brilliant cut diamonds weighing approximately 1.20 carats total. Mounted in yellow gold. Ring

A PLATINUM, BLACK OPAL AND DIAMOND RING Centering a black opal oval-shaped double cabochon weighing approximately 4.50 carats encircled by round and tapered baguette diamonds weighing approximately 1.

A gold single stone black opal ring, A gold single stone black opal ring, a round cabochon black opal, damaged, rub set to tapering, textured, flat section band, tested as approximately 18ct gold, 11.

consisting of one 18 karat chain and one 14 karat pendant center set with one round cabochon cut opal, approximately 0.50 carats, pendant measures 31.00 x 22.00 mm. in diameter and weighs 8.2 grams; N

NO RESERVE - AN ANTIQUE BLACK OPAL AND DIAMOND BAR BROOCH, CIRCA 1910, Made in yellow gold and platinum, Oval cabochon black opal, weighing approximately 1.61 carats, Single cut and rose cut diamonds,

A black opal, diamond and eighteen karat gold ringdesigned as a pear cabochon black opal, measuring approximately 9.75 x 7.50 x 3.90 mm, framed by round brilliant-cut diamonds. 2.7 dwt; size: 10 1/2

Opal and Diamond Earrings sterling silver, the earrings mounted with round cabochon-cut opals weighing approximately 7.15 carats in total, accented by round-cut diamonds weighing approximately 2.94 ca

A BLACK OPAL AND DIAMOND PENDANT in 18ct yellow gold, set with a cabochon black opal of 3.40 carats, the bail accented by three round cut diamonds, stamped 18K, 2.2cm, 1.4g.

A Platinum, Black Opal and Diamond Pendant, containing one oval cabochon cut black opal measuring approximately 29.00 x 21.00 x 8.84 mm and 52 round brilliant cut diamonds weighing approximately 5.00

13.26 Carat Oval Cabochon Black Opal, 2.26 Carat TW Eighteen Round Brilliant Cut Diamond and Platinum Ring. Opal with very good play of multi color. Diamonds E-F color, VVS-VS clarity. Stamped Pt900.

An Opal Pendant. 14 karat yellow gold mounting contains one pear shaped cabochon semi-black opal which weighs approximately 25.20 carats 1.75" x 1" Wt: 9.5 grams

Title: 3.10Cts Natural Multi color Black Opal RoundCabochon Good Luster loose gemstone Carat Weights: 3.1 Size/Dimensions: 10.00x10.00x6.60 MM Additional Information: VVS QUALITY HEATED WITH PLAY OF C

BLACK OPAL AND DIAMOND RING Containing one oval cabochon black opal measuring approximately 23.00 x 15.00 x 6.45 mm and 34 transitional and single cut diamonds weighing approximately 0.65 carat total.

ART DECO, BLACK OPAL AND DIAMOND BROOCH Containing one oval cabochon black opal measuring approximately 19.85 x 17.10 x 5.85 mm and 18 old mine cut diamonds weighing approximately 0.80 carat total. Mo

A BLACK OPAL AND DIAMOND CLUSTER RING LONDON 1975The oval cabochon black opal within a surround of brilliant cut diamonds, approximately 0.48 carats total, the 18 carat gold shank stamped with sponsor

Opal and Diamond Ring.  A .94 carat cabochon black opal is raised above a .78 carat round, brilliant-cut and baguette, G-I color, SI1-SI2 clarity diamond skirt on a platinum ring.  The ring

DIAMOND AND MULTIGEM PENDANT Containing 71 round brilliant cut diamonds weighing approximately 0.35 carat total, three opal doublets and numerous round black gemstones. Mounted in blackened silver and

Unmounted black opalfeaturing one round black opal cabochon displaying broad flashes of dark blue to red play of color, measuring approximately 12.50 x 12.56 x 6.98 mm and weighs 7.03 cts. Note: Opal

Crafted in platinum and 18K gold; set with a trapezoid cabochon-cut black opal, measuring approximately 12.40 x 9.30 x 4.65 mm; lozenge-shaped sapphire, weighing approximately 2.60 carats; accented by

An Opal and Diamond Ring. 14 karat yellow gold mounting contains one round opal cabochon which is approximately 4.00 carats. Surrounding the opal are two rows of prong set round brilliant diamonds whi

centering one round cabochon cut natural black star diopside weighing approximately 11.07 carats 15.8 grams size: 6 1/4

Title: 2.46 Ctw Natural Black Fire Opal Round Cabochon Stone Clarity: Opaque Gemstones: Natural Opal Carat Weights: 2.46 Size/Dimensions: 9.90 x 9.90 x 5.70 mm Additional Information: Shape - Round Ca