A black opal brooch. The oval opal cabochon collet,

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 single stone black opal ring, A single stone black opal ring, an oval cabochon opal, approximately 9.00mm x 13.00mm, claw set to a plain collet, to trifurcated shoulders, and a plain shank. Tested a

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,

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

LOOSE NATURAL UNTREATED OVAL CABOCHON BLACK OPALOpal measures 8.4x7.1x4.3mmNatural untreated African Black Opal1.25ctAll pictures are taken without any artificial light, only natural daylight, so you

LOOSE NATURAL UNTREATED OVAL CABOCHON BLACK OPALOpal measures apx 8.5x6.2mmNatural untreated African Black Opal0.85ctAll pictures are taken without any artificial light, only natural daylight, so you

An opal bar brooch. The oval opal cabochon, within a rope-twist surround, to the plain bar sides. Estimated dimensions of opal 9.2 by 8.2 by 2.7mms. Length 6cms. Weight 5.1gms.

Title: 3.30Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 3.3 Size/Dimensions: 12.50x9.00x5.70 MM Additional Information: HEATED Reserve: $40.00 Shipping: D

Title: 3.35Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 3.35 Size/Dimensions: 12.80x8.50x6.30 MM Additional Information: VVS QUALITY HEATED WITH PLAY OF C

No Reserve! Title: 3.25 Ct Natural Australian Black Opal Oval Cabochon Stone Clarity: Opaque Gemstone: Natural Australian Opal Carat Weight: 3.25 Size/Dimensions: 12.80 x 8.50 x 3.50 mm Additional Inf

Title: 1.80Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weight: 1.80 Size/Dimensions: 11.30x7.70x4.40 MM Additional Information: NATURAL HEATED Reserve: $20.00 Shi

Title: 1.60Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 1.6 Size/Dimensions: 9.20x7.40x4.70 MM Additional Information: VVS QUALITY HEATED WITH PLAY OF COL

Title: 1.15Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 1.15 Size/Dimension: 9.60x6.90x3.60 MM Additional Info: HEATED WITH PLAY OF COLOR Reserve: $10.00

Title: 2.30 Ctw Natural Australian Black Opal Oval Cabochon Stone Clarity: Opaque Gemstones: Australian Opal Carat Weights: 2.3 Size/Dimensions: 13.60 x 5.70 x 3.00 mm Additional Information: Nice Ova

Title: 1.45Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 1.45 Size/Dimension: 10.80x6.10x3.30 MM Additional Info: HEATED WITH PLAY OF COLOR Reserve: $10.00

Title: 3.25Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 3.25 Size/Dimensions: 12.30x9.00x6.00 MM Additional Information: ETHIOPIA HEATED WITH PLAY OF COLO

Title: 1.10Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weight: 1.10 Size/Dimensions: 10.80x6.10x3.30 MM Additional Information: NATURAL HEATED Reserve: $15.00 Shi

Title: 1.40Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 1.4 Size/Dimensions: 9.10x6.90x4.40 MM Additional Information: ETHIOPIAN - HEATED WITH PLAY OF COL

Title: 1.00Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 1 Size/Dimension: 10.70x4.70x3.10 MM Additional Info: HEATED WITH PLAY OF COLOR Reserve: $10.00 Sh

Title: 2.05Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 2.05 Size/Dimensions: 12.10x7.70x4.20 MM Additional Information: HEATED WITH PLAY OF COLOR Reserve

Title: 2.10Cts Natural Multi color Black Opal Oval Cabochon Good Luster loose gemstone Carat Weights: 2.1 Size/Dimensions: 12.20x7.30x4.70 MM Additional Information: HEATED WITH PLAY OF COLOR Reserve:

Lady's 14k Black Opal & Diamond Ring Size 5. Includes a prong set black opal oval cabochon measuring 9.42x5.7x3.8mm (1.15ct). It is slightly bluish green with a moderate amount of crazing. It is flank

A mid 20th century diamond and opal bar brooch. The oval opal cabochon, with old-cut diamond sides, to the tapered bar. Estimated total diamond weight 0.20ct. Length 6.6cms. Weight 4.7gms.

Title: 2.05Cts Natural Multi color Ethiopia Black Opal Oval Cabochon Good Luster loose gemstone Brand: MRS GEMS Carat Weights: 2.05 Size/Dimensions: 11.20x8.10x4.50 MM Additional Information: HEATED P