A un-treated black opal, diamond and eighteen karat bi-color gold ring

A un-treated black opal, diamond and eighteen karat bi-color gold ringdesigned as an oval cabochon black opal, measuring 14.49 x 12.65 x 6.51 mm, within pierced and millegrained round brilliant-cut di

A diamond, cognac diamond and eighteen karat bi-color gold ring, Pavéof spiral design, featuring a row of tension-set rough diamond cubes, centering a cushion modified brilliant-cut near colorles

A black opal, diamond and eighteen karat gold ringdesigned as an oval opal, measuring approximately 13.3 x 10.9 x 3.5 mm, within marquise and round brilliant-cut diamond mount; estimated total diamond

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

Included is a white gold Masonic ring set with black onyx tablet measuring approximately 18mm x 9mm with one single cut diamond accent, size 5.75. Also included are three bicolor gold rings set with d

Vintage Approx. .70 Carat TW Ten Round Brilliant Cut Diamond, 9.2mm Gem Quality Black Pearl, Black Opal Mosaic and 14 Karat Yellow Gold Ring. Diamonds F color, VS1-VS2 clarity. Opals with good play of

Vintage Black Opal Mosaic Inlaid 14 Karat Yellow Gold Ring with Approx. .30 Carat TW Two Round Brilliant Cut Diamonds. Opals with good play of color. Diamonds F color, VS1-SI1 clarity. Stamped 14K. Ri

Vintage Black Opal Mosaic Inlaid 14 Karat Yellow Gold Ring with Approx. .65 Carat TW Four Round Brilliant Cut Diamonds. Opals with good play of color. Diamonds F color, VS1-VS2 clarity. Stamped 14K. R

A group of sapphire ringsincluding two eighteen karat bi-color gold rings, with central circular-cut sapphires, each weighing approximately 0.25 carat; a fourteen karat gold ring, designed as channels

A black opal and eighteen karat gold ringdesigned as an oval opal, measuring approximately 17.80 x 12.00 mm, bezel-set within substantial gold mount. 8.0 dwt; size: 6 1/2

A turquoise, diamond and fourteen karat bi-color gold ringdesigned as an oval turquoise cabochon, measuring approximately 10.80 x 8.90 x 4.00 mm, flanked by round brilliant-cut diamond set ribbons in

A diamond and fourteen karat bi-color gold ringdesigned as a line of five marquise-cut diamonds, between baguette-cut diamond cluster and yellow gold shoulders, on white gold hoop. 2.7 dwt; size: 7

BICOLOR GOLD AND DIAMOND RING Round brilliant cut diamonds and 18 karat bicolor gold. Ring size 7.Stamp: 18K.Gross weight: 5.00 dwt. This lot is located in Chicago. <

BICOLOR GOLD AND DIAMOND RING Round brilliant cut diamonds and 18 karat bicolor gold articulated hoops. Ring size 5.&nbsp;Stamp: 750.Gross weight: 8.40 dwt. This lot is located in Chicago.</

An 18 Karat Bicolor Gold and Diamond Ring, Italian, containing 73 round brilliant cut diamonds weighing approximately 2.92 carats total, with ribbed textured gold surround. Stamp: 18K ITALY. 15.70 dwt

A 14 Karat Bicolor Gold and Diamond Ring, consisting of a bypass design containing 108 round brilliant cut diamonds weighing approximately 1.35 carats total. Stamp: 14K 585 anju. 3.40 dwts. Estimate $

An 18 Karat Bicolor Gold and Diamond Ring, Lang, containing ten baguette cut diamonds weighing approximately 0.70 carat total. Stamp: 750 LANG 18K. 5.30 dwts. Estimate $ 400-600 The ring is approximat

An 18 Karat Bicolor Gold and Diamond Ring, containing 24 round brilliant cut diamonds weighing approximately 1.20 carats total. Stamp: 750 TLI. 5.60 dwts. Estimate $ 400-600 The ring has scattered sup

A 14 Karat Bicolor Gold and Diamond Ring, containing 27 round brilliant cut and 16 tapered baguette cut diamonds weighing approximately 1.00 carat total. Stamp: 14K MW4 1.00CT. 3.60 dwts. Estimate $ 3

A 14 Karat Bicolor Gold and Diamond Ring, containing six round brilliant and 16 single cut diamonds weighing approximately 0.80 carat total. Stamp: 14K (maker's mark). 2.90 dwts. Estimate $ 500-700 Pr

A 14 Karat Bicolor Gold and Diamond Ring, containing one round brilliant cut diamond weighing approximately 0.36 carat, 15 round brilliant cut diamonds weighing approximately 0.32 carat total and one

An 18 Karat Bicolor Gold and Diamond Ring, Fope, containing 10 round brilliant cut diamonds weighing approximately 0.05 carat total. Stamp: MOD. DEP. (maker's mark) 750 (Italian hallmarks) FOPE ITALY.

OPAL AND DIAMOND RING Containing one freeform opal and 18 round brilliant cut diamonds weighing approximately 0.55 carat total in a rectangular textured setting. Mounted in bicolor gold. Ring size 6 3

A 14 Karat Bicolor Gold and Diamond Buckle Ring, containing 16 round single cut diamonds measuring approximately 1.30 mm in diameter. Stamp: 14K. 6.20 dwts.