AN UNMOUNTED BLACK OPAL cushion shaped cabochon, 2.49

No Reserve! Title: 1.21 Ct Natural Australian Black Opal Cushion Cabochon Stone Clarity: Opaque Gemstones: Natural Australian Opal Carat Weights: 1.21 Size/Dimensions: 6.60 x 6.60 x 2.90 mm Additional

Title: 3.10 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Opaque Gemstone: Natural Black Opal Carat Weight: 3.1 Size/Dimensions: 15.00 x 6.70 x 5.10 mm Additional Information: Shape - Cu

Title: 1.80 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Translucent Gemstones: Natural Opal Carat Weights: 1.8 Size/Dimensions: 8.70 x 8.60 x 4.60 mm Additional Information: Shape - Cu

No Reserve! Title: 2.43 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Opaque Gemstones: Natural Black Opal Carat Weights: 2.43 Size/Dimensions: 11.20 x 7.60 x 5.20 mm Additional Informat

No Reserve! Title: 0.95 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Translucent Gemstones: Natural Opal Carat Weights: 0.95 Size/Dimensions: 9.60 x 6.00 x 3.10 mm Additional Informatio

No Reserve! Title: 1.01 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Translucent Gemstones: Natural Opal Carat Weights: 1.01 Size/Dimensions: 9.30 x 5.90 x 3.00 mm Additional Informatio

No Reserve! Title: 0.85 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Translucent Gemstones: Natural Opal Carat Weights: 0.85 Size/Dimensions: 8.80 x 6.70 x 3.20 mm Additional Informatio

No Reserve! Title: 1.71 Ctw Natural Black Fire Opal Cushion Cabochon Stone Clarity: Translucent Gemstones: Natural Opal Carat Weights: 1.71 Size/Dimensions: 11.80 x 6.10 x 4.70 mm Additional Informati

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.

YELLOW GOLD AND OPAL SET Consisting of a brooch containing one cushion cabochon black opal measuring approximately 22.60 x 19.15 mm, together with a pair of earclips containing two oval cabochon opals

A BLACK OPAL AND DIAMOND PENDANT AND CHAIN in 18ct yellow gold, the pendant set with a pear shaped cabochon black opal in a border of round brilliant cut diamonds, accented by a further round brillian

OPAL AND DIAMOND RING in 18ct yellow gold, set with a cushion-shaped cabochon opal in a border of round cut diamonds, with further round cut diamonds to the shank, unmarked, size M / 6, 4.5g.

Opal, Diamond, 14k Yellow Gold Ring. Featuring one rectangular cushion shaped opal cabochon measuring approximately 16.4 x 13.2 mm, flanked by four tapered baguette-cut diamonds weighing a total of ap

Arts and Crafts Black Opal, Diamond, Enamel, Gold Necklace, Marcus & Co. The necklace

Arts and Crafts Black Opal, Diamond, Enamel, Gold Necklace, Marcus & Co. The necklace

Black Opal, Diamond, Platinum, Gold Ring The ring features an oval-shaped black opal caboc

Black Opal, Diamond, Platinum Ring, Ayres The ring features a pear-shaped black opal caboc

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

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

Featuring two oval-shaped black opal cabochons with blue and green play of color​, weighing a total of approximately 2.80 carats, in a textured 14K yellow gold setting; tops measure 7/8 x 5/

Tuxedo Agate_x000D_ Dyed Black Agate: One cushion shaped 30 x 20mm cabochon_x000D_ Amethyst: One round modified-brilliant cut 5mm_x000D_ Pendant Details_x000D_ Metal: Rhodium over sterling silver_x000

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.

OPAL AND DIAMOND CLUSTER RING The circular opal cabochon within a cushion-shaped diamond surround, within closed back settings, diamonds approx. 1.20cts total, ring size approx. L½

Unmounted opal the unmounted irregular tear drop shaped opal flat cabochon, measures approximately 19.80 x 13.30 x 2.93 mm, weighs 4.56 cts., displays broad flashes of green with some blue and orange