Vintage Opal and Diamond Brooch

DESCRIPTION: A Platinum convertible Brooch/pendant centered by a Large White Opal weighing approx. 20.6cts, encompassed by a series of Round cut Diamonds the top tier diamonds weighing approx. 0.25cts

Set with 3 round opals each approx. 4.5mm, and a center (5pt) diamond over an onyx stone approx. 15x11mm, in yellow gold stamped 14K, 2.5x2.25in., 21.2gms. Opening Bid: $500/

About 1 1/2" wide, WITH 12 fabulous opals and small brilliant diamond center stone, total weight 9 dwt 14 grams

Vintage Brutalist 14k yellow and white gold, diamond and opal pin. Apparently unmarked, tested for fineness. Approx. h.2.25", w. 1.125", total weight 12.6g. Ahlers & Ogletree, Inc. reserves the right

Vintage butterfly brooch with two opal wings set on 14k white gold, 14k yellow gold and silver. Edged with small diamonds. Central body in white gold with our round diamonds and two ruby cabochon eyes

Title: Art Nouveau Opal Diamond Enamel Pendant—Brooch 14k Additional Information: Vintage from the 1910s Materials: Gold Gemstone: Opal Style: Art nouveau Description Ombré enamel surrounds

Vintage Victorian Design Opal, European Cut Diamond and Gold over Silver Pendant/Brooch. Unsigned. Good antique condition. Pendant/Brooch measures 3" H, 1-3/4" W; chain measures 16" L. Approx. weight:

Ed Wiener (American, 1918-1991). Signed vintage designer gemstone brooch. A freeform Brutalist design with prong set round cut diamonds set around a large oval opal doublet with great play of color. C

Three Piece Vintage Gemstone and 14 Karat Yellow Gold Lot. Includes curved brooch with round opals and sapphires, slide pendant with opal and diamonds, slide pendant with opal and multi gemstones. Cur

A VINTAGE DIAMOND BROOCH of scrolling design, set with round brilliant cut and baguette cut diamonds, suspending a trio of tassels further set with round cut and baguette cut diamonds, the diamonds al

A VINTAGE DIAMOND BROOCH in platinum, designed as a scrolling spray, set with pear and baguette cut diamonds all totalling approximately 5.8-6.2 carats, stamped PT, 5.4cm, 19.3g.

This wonderful and romantic Victorian-era brooch shimmers with 12 colorful heart shaped opals and 44 sparkling old mine-cut diamonds, all of which are set in 14K gold. This distinctive and dreamy anti

A VINTAGE DIAMOND BROOCH in 18ct white gold, the scrolling body set with old cut diamonds all totalling 4.4-4.7 carats, later British hallmarks, 4.3cm, 11.9g.

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)

A VINTAGE DIAMOND BROOCH in platinum, set throughout with old cut diamonds, the diamond totalling 2.0-2.2 carats, Portuguese assay marks, 4.0cm, 10.6g. 

1970's Victorian Revival Australian Opal Diamond Brooch. Featuring an open frame floral motif centrally set with a oval cabochon cut "jelly" opal exhibiting a harlequin blue, green and red play of col

A VINTAGE DIAMOND BROOCH, DAVID SHACKMAN & SONS 1975 in 18ct yellow and white gold, formed of naturalistic gold batons accented by crescent moon designs, set with round cut diamonds, maker's mark DS&S

Large oval 14K yellow gold brooch with hidden bail on back to convert to a pendant, set with large white opal cabochon and the foliate frame set with brilliant cut white diamonds, height 2", width 1.7

Vintage opal, diamond, and platinum ring, having one (1) approximately 12.60mm x 8.85mm oval shape light gray bodied opal with very good play of color and twenty eight (28) round brilliant transitiona

ONLY MAGNIFICENT JEWELS Gorgeous 3D real-life Dolphins pin Diamonds: .20ct. Round, H-color Vs-2 & Si-1 clarity Natural Opals Gorgeous threads of blues, reds and greens. measurement of pin: 1.1 X .73 I

Ladies 14Kt Yellow Gold Vintage Opal / Diamond Ring. Ring has one Opal on the center with 3 round Diamonds. Ring size: 6.50. Total weight: 11.50 Grams.

METAL: 14k Gold. MEASUREMENTS: Brooch is 35mm in diameter. GEMSTONES: Opal (multiple stones are chipped). Diamonds approx. 0.60ctw. MARKED: 14k. WEIGHT: 11.4 grams.Gemstones have not been graded for c

Ladies 18k Yellow Gold and Opal Ring, and an Opal, Diamond and 10k Yellow Gold Brooch. 7.7 g.t.w. Brooch: L: 1.25 in.

A ladies 14kt Yellow Gold Vintage Diamond Brooch. Brooch has a diamond stone in the center. Diamond weight 0.12ct. Total weight: 6.50 grams. #AY