black opal

Platinum, Black Opal and Diamond Pendant-Necklace, Marcus & Co., Circa 1910-1915. photo Sotheby's The pendant set with an ovoid black opal measuring approximately 36.0 by 24.5 by 5.1 mm., within a garland-style mounted set with old European-cut and single-cut diamonds, completed by a platinum chain set with old European-cut diamonds, the clasp set with single-cut diamonds, total diamond weight approximately 1.50 carats, length 18½ inches, signed Marcus. Estimate 5,000—7,000 USD. Lot Sold 53,125 USD NOTE: The necklace... [Lire la suite]

Spectacular Black (Dark Brown) Nevada Opal. Royal Peacock Mine, Virgin Valley, near Denio, Nevada  © 2002-2010 Bonhams 1793 Ltd Weighing 25.48 carats and measuring 19.5 x 28.0 x 7.5mm - Estimate: $10,000 - 15,000 Note: Some of the most stunning black opals in the world come from the Royal Peacock mines in Virgin Valley, Nevada. Discovered in 1912, in an isolated area thirty miles southwest of Denio at an elevation of 5,000 to 6,000 feet, the Royal Peacock mine is located in the southern end of Virgin Valley. The Wilson... [Lire la suite]

Historic Carved Black Opal together with the book "The Story of the Gems". Lightning Ridge, New South Wales, Australia © 2002-2010 Bonhams 1793 Ltd Weighing approximately 29.23 carats and measuring 38.0 x 15.0 x 8.0 mm. Sold for $28,060 Carved with a minutely detailed snake entwining the base of the stone, this elongated cabochon has predominantly brilliant broad flash reds, as well as green, blues and yellows. A unique and historic stone, it must surely have figured prominently and been exhibited in the Morgan Gem... [Lire la suite]

A World-Class Gem-Quality Australian Black Opal—"The Stardust Opal". T-Bones Mine, Corcoran, Lightning Ridge, New South Wales, Australia © 2002-2010 Bonhams 1793 Ltd Weighing 14.40 carats and measuring 18.5 x 14.1 x 8.0mm. Sold for $39,650 Found in 1981, in the Corcoran opal field 30 km west of the township of Lightning Ridge, the present gem is a textbook example of a true black opal from this prestigious locality. A magnificent oval cabochon, probably cut from a knobby (a nodule) "Stardust" possesses... [Lire la suite]

A black opal and diamond ring Of floral design, the oval black opal, weighing 10.72 carats, within a millegrain-set brilliant-cut diamond petal surround, mounted in platinum, diamonds approximately 4.00 carats total, ring size 6½.,Estimate: HK$300,000 - 400,000, $39,000 - 52,000. Unsold Accompanied by a gem identification report. Report number 540539. Bonhams. Fine Jewellery and Jadeite and Modern Wristwatches, 21 May 2009. Island Shangri-La Hong Kong Hotel, Admiralty, Hong Kong www.bonhams.com