An Amoeba-Shaped Black Opal Ring in 18K

18K yellow gold ring featuring an amoeba shaped black opal measuring approx. 18 x 7 mm, bezel set, sz 7, 15.1 grams

18k Gold & Black Opal Ring, size 8, 2.6g, marked "18k". All credit cards will be manually verified prior to shipment.

METAL: 18k Gold. GEMSTONES: Diamonds approx. 0.28ctw, Black opal. MEASUREMENTS: Ring size 6.5, top is 28mm x 29mm. MARKED: Tayma, 750. WEIGHT: 13.8 grams.Gemstones have not been graded for color and c

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

3.70ct Black Opal, 0.95ctw SI1-SI2/G-H Diamond Solid Platinum Ring - This ring was finely crafted of solid platinum and boasts a 3.70ct (approximate) oval shaped black opal which displays an exquisite

2.75ct Black Opal, 1.25ctw VS2-SI1/G-H Diamond Solid Platinum Ring - This lovely ring was finely crafted of solid platinum and boasts an approximately 2.75ct oval-shaped black opal which displays an e

2.45ct Black Opal, 0.50ctw SI1-SI2/G-H Diamond Solid Platinum Ring - This ring was finely crafted of solid platinum and boasts an approximately 2.45ct oval shaped black opal which displays a beautiful

An 18k yellow gold, diamond and black opal ring, 48 total diamonds, black opal 12.7mm x 9.525mm with 4 prong setting; 15 grams total weight. Overall good condition. Ring size 8.

18K yellow gold ring. 5 pear shaped opals make the petals of the ring, accents of 6 diamonds fill in the spaces between petals. Stamped 18K. Ring size 5 1/2. 6.3 grams.

This is a 1970's 18k yellow gold and black Australian opal ring with a total of 6.60Cts.  The ring is centrally set with an oval cabochon cut opal that measures 17.80mm x 13.00mm x 4.99mm.  The opal

This is an 18kt yellow gold black opal doublet ring. The approximate 12mm x 8mm oval opal doublet is in a lost wax cast nugget-style setting made of 18kt yellow gold. The ring is US size 6 and weighs

Italian 18kt yellow gold ring, black opal triplet cabochon, approx 15.65 x 8.00 mm, in a hand-engraved modernist setting, approx size 7.25-7.5, 13.7 grams (inclusive of all materials) **Provenance: A

AN 18K GOLD, CITRINE AND BLACK DIAMOND RING • 18k yellow gold • Numerous round and 6 pear-shaped cabochon citrines • Numerous round black diamonds weighing approximately 1.40 carats

Opal, Diamond, 18k Yellow Gold Ring. Featuring one pear shaped opal cabochon measuring approximately 16.7 x 11.72 mm, accented by fourteen full-cut diamonds weighing a total of approximately 0.50 cttw

Opal, Diamond, 18k Yellow Gold Ring. Featuring one oval shaped opal cabochon measuring approximately 23.2 x 14.1 mm, accented by twelve full-cut diamonds weighing a total of approximately 0.65 cttw.,

Opal, Diamond, 18k Yellow Gold Ring. Featuring one oval shaped opal cabochon measuring approximately 11 x 8.9 mm, accented by forty-six round-cut diamonds weighing a total of approximately 0.15 cttw.,

Circa 1890 18K Yellow Gold Mounted Ring, with navette shaped black onyx stone and round faceted diamond, size 7 1/2, 3.2 dwt tw.

Opal, 18k Yellow Gold Ring. Featuring one oval shaped opal cabochon measuring approximately 7.5 x 6.3 mm, surrounded by twelve full-cut diamonds weighing a total of approximately 0.10 cttw., set in an

Opal, Diamond, 18k Yellow Gold Ring. Featuring one oval shaped opal cabochon measuring approximately 18.15 x 13.1 mm, accented by four full-cut and six baguette-cut diamonds weighing a total of approx

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 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.

Centering an rectangular shaped black jade, mounted in 18K gold.

An 18k gold band with three inset round amethyst cabochons; An oval black opal doublet in substantial 14k gold square head. Size 6. 11.1 dwt.