Stunning Black Opal, Diamond and 18K Necklace

Stunning Art Nouveau Black Opal Diamond and Demantoid Garnet Necklace 14K Gold. Articulated pendent supporting two fancy-cut black opals, accented by old mine-cut diamonds and demantoid garnets. &bull

An Antique 18K and Platinum Tie Pin with Stunning Lighting Ridge Black Opal with Distinguished Harlequin Pattern • Black Opal Measures 7mm x 10mm x 2.6 mm / 1.01 Carat Approx • Surrounded by

13mm Black Opal & Solid 18K White Gold 18" Necklace W/Diamond Accents - This lovely necklace was finely crafted of solid 18k white gold and is comprised of a 0.75" pendant which hangs on an 18" chain.

2.30ct Black Opal, 0.30ctw VS1-VS2/G-H Diamond & Solid Platinum Pendant on Adjustable 18K White Gold Chain - This beautiful necklace is comprised of a 1" solid platinum pendant which hangs on an 18" s

83.10ct Yellow-Orange Fire Opal, 11.25ctw Multi-Color Tourmaline, 2.25ctw VS1-VS2 Multi-Colored Diamond & Solid 18K Yellow Gold 18" Necklace (W/$30,000 Appraisal) - This stunning necklace was finely c

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

GIA certified 5.51 G boulder opal pendant hung on an 18K yellow gold black diamond beaded necklace. Center stone set in a white + yellow metal pendant w/numerous near colorless round brilliants. Measu

Vintage Large and Magnificent Oval Cabochon Opal, Round Brilliant Cut Diamond and 18 Karat Yellow Gold Necklace. Opal measures 1-1/8" L, 13/16" W. Diamonds F-G color, VS1-VS2 clarity. Stamped 750. Mea

A LATE 19TH / EARLY 20TH CENTURY BLACK OPAL AND DIAMOND NECKLACE graduated oval black opals suspended from diamond-set knife-edge bars to black opal and diamond swag links, to a diamond-set double bar

Pomellato 0.30ctw Black Diamond and Solid 18K Rose/White Gold Forever Bow Necklace - This lovely Forever necklace from Pomellato is crafted of solid 18k rose and white gold and has a dainty bow pendan

Pomellato 0.30ctw Black Diamond and Solid 18K Rose/White Gold Forever Bow Necklace - This lovely Forever necklace from Pomellato is crafted of solid 18k rose and white gold and has a dainty bow pendan

Approx. 2.14 Carat Opal,3.38 Carats Diamonds and 18 Karat White Gold Pendant. Stamped 18K. Measures 1-1/4" x 1-1/4". Approx. weight 6.15 grams. Condition: As New Condition. Estimate: $500.00 - $700.00

Approx. 12.81 Carat Opal, .93 Carats Diamonds and 18 Karat White Gold Pendant. Stamped 18K. Measures 1-5/8" x 1-1/2". Approx. weight 10.68 grams. Condition: As New Condition. Estimate: $800.00 - $1200

NO RESERVE - A BLACK OPAL AND DIAMOND PENDANT NECKLACE, CIRCA 1910, Made in 15 carat yellow gold, platinum and 18 carat yellow gold, the chain later added, Oval cabochon black opal, weighing approxima

Fire Opal, Diamond, 18k Yellow Gold Necklace. Featuring one rectangular, faceted-top fire opal measuring approximately 15.9 x 10.1 mm, suspending three faceted fire opal bead tassels, wrapped in an 18

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

1.50ctw VS1-VS2/G-H Diamond, 18K White Gold and 3mm-8mm Opal Bead 7-Strand Necklace - This beautiful necklace has a 7-strand design lined with a plethora of 3mm-8mm genuine solid opal beads. The neckl

Antique Black Australian Opal on Matrix Diamond Brooch of 18K Gold Dimensions: 15.86 x15.35 x12.00 mm* Weight: 22.80 grams* * (estimate/approximately)

The pear-shaped opal, 15.40 x 10.54 mm, within a nest of RBC diamond, approx. .33 ct. TW. and bright gold wire, on braided chain. 14k. 1 1/2" x 3/4", 18". 4.4 dwt.

Opal Bead, Diamond, 18k Yellow Gold Necklace. Featuring opal beads ranging in size from approximately 7.5 mm to 4.7 mm, completed by a diamond, 18k yellow gold bean shaped clasp, forming a graduated 1

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

1.00ctw Ruby, 0.85ctw SI1-SI2/G-H Diamond, 18K Yellow/Rose Gold and Black Cord 26" Cross Necklace - This lovely necklace is comprised of a solid 18k yellow and rose gold cross pendant on a black cord

18K Opal Diamond Necklace, 8.1g. Marked 750. Receipt Marked: "Curtis Jewelers Opal Guarantee... Opal type: Crystal, Carat Weight 20.68ct." Pendant Approximately 2.0L x 0.875W in. Opal Approximately 1.