12 novembre 2010

A World-Class Gem-Quality Australian Black Opal—"The Stardust Opal". T-Bones Mine, Corcoran, New South Wales, Australia

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]