An oval cabochon opal displays even predominately blue-green pin fire with red-orange highlights, 6 cts. by formula, 6 diamond accents, approx. .18 ct. TW. Marked 750. Size 4 1/2. 6.8 dwt.
Auctioneer:
Rago Auctions
Date:
2016-12-04
MARCUS & CO. BLACK OPAL, DIAMOND PLATINUM RING; Oval Australian black opal cabochon, 22.9 x 14 x 4.77 mm., 8.87 cts. by formula, red-orange/blue-green spectral Read more…
Auctioneer:
Rago Auctions
Date:
2014-12-07
BELLE EPOQUE SEMI-BLACK OPAL DIAMOND GARLAND LAVALIER. Pear-shaped semi-black opal 27mm x 16.5mm x 3.38mm, 6.5 cts. by formula, very colorful, with OEC diamonds in Read more…
Auctioneer:
Rago Auctions
Date:
2011-12-04
BLACK OPAL, DIAMOND, DEMANTOID GARNET RING, ca. 1910. Oval cluster in colors of a peacock feather, OEC diamonds, approx. 1 cts. TW, surround a row Read more…
Auctioneer:
Rago Auctions
Date:
2011-12-04
Art Deco Platinum, Black Opal, Diamond and Gem-set Brooch, designed as a black opal pot on diamond baguette stand holding flexibly set diamond melee bouquet, Read more…
Auctioneer:
Skinner
Date:
2007-03-13
Art Deco Platinum, Black Opal, Diamond, and Seed Pearl Necklace, c. 1926, composed of a delicate platinum and seed pearl chain with bezel-set opal and Read more…
Auctioneer:
Skinner
Date:
2016-09-27
Art Deco Platinum, Black Opal, Diamond and Ruby Brooch, bezel-set with a black opal framed by bead-set old single-cut diamonds and highlighted by square-cut rubies, Read more…
Auctioneer:
Skinner
Date:
2009-09-15
Arts & Crafts Black Opal Diamond Pendant Necklace, The Brassler Company, Newark, New Jersey, set with three opal cabochons among pine cone and scroll motifs, Read more…
Auctioneer:
Skinner
Date:
2006-03-14
Art Nouveau Black Opal, Diamond, and Enamel Pin, Bailey, Banks & Biddle, bezel-set with an oval broadflash opal, accented by green enamel and lines of Read more…
Auctioneer:
Skinner
Date:
2004-09-21
An oval black opal cabochon, 22.2 x 11.3 x 5.9mm set in shaded translucent green and blue enameled surmount suspends similar pear-shaped black opal cabochon Read more…
Auctioneer:
Rago Auctions
Date:
2016-11-05
4.74 CT. AUSTRALIAN BLACK OPAL AND DIAMOND NECKLACE, L 1 1/4":Diamonds .60 ct. Vs-2 clarity, H-color. Total weight 7.2 grams. Opal is not a doublet. Read more…
Auctioneer:
Dumouchelle Art Galleries
Date:
2008-04-20
