13 novembre 2010
Extraordinary Boulder Opal Cabochon. Koroit, Queensland, Australia
Extraordinary Boulder Opal Cabochon. Koroit, Queensland, Australia © 2002-2010 Bonhams 1793 Ltd
Weighing approximately 188.0 carats and measuring 70.0 x 32.0 x 12.5mm - Sold for $8,540
This is an exceptional and very large, gem-quality pear-shaped cabochon of boulder opal exhibiting a web pattern of fine lines of electric green and blue opal in the ironstone matrix. The green and blue coloration as well as the near-metallic luster of the piece are evidence of its high iron content.
Bonhams & Butterfields. The... [Lire la suite]12 novembre 2010
Rare Boulder Opal and Diamond Necklace—"The Black Rainbow". Queensland, Australia
Rare Boulder Opal and Diamond Necklace—"The Black Rainbow". Queensland, Australia © 2002-2010 Bonhams 1793 Ltd
Designed and fabricated by James Currens. 2009 AGTA Spectrum Award Winner for 1st Place—Phenomenal Gemstone Category
Featuring a fancy cabochon natural boulder opal, weighing approximately 34.80 carats, exhibiting the most extraordinary ribbon pattern characterized by strong horizontal stripes of iridescent green and electric blue on an ironstone matrix. The exquisitely hand-fabricated platinum... [Lire la suite]