Opal Stone – Natural, Rough, Brown
Menilite, 9 x 6.8 x 4 mm, Plateau de Merdogne, Puy-de-Dôme, Auvergne France. Photo by Didier Descouens. Licensed under CC By-SA 4.0.
Opal Stone – Natural, Cabochon, Red, 8.62 ct
8.62-ct Brazilian yellow opal, 18 x 12.5 mm, oval buff top cut. © The Gem Trader. Used with permission.
Fire Opal – Natural, Specimen, Orange
Fire opal, 6.3 x 5.9 x 3.3 cm, Chihuahua, Mexico. © Rob Lavinsky, www.iRocks.com. Used with permission.
Opal Stone – Natural, Rough, Blue, 12.71 ct
Opal rough and cut set, 3.2 x 3.2 x 2.8 cm (crystal), 12.71 cts (cabochon), Acari Mine, Caraveli Province, Arequipa Department, Peru. © Rob Lavinsky,…
Opal Stone – Lab-made, Cabochon, Blue
The photographer does not mention the origins of this opal. But, based on its appearance it’s likely a synthetic gem. Photo by Stephanie…
Opal Stone – Natural, Faceted, Green, 3.51 ct
Opal, 3.51 cts, 1.3 x 1.2 x 0.5 cm, cut by Spectrum Award-winning faceter Mark Kaufman. Tsehay Mewcha, Wegeltena, Delanta Woreda, South Welo, Amhara…
Black Opal – Natural, Other, Black, 60 ct
Black opal: Australia (freeform cabochons approximately 30 cts each). Photo © Joel E. Arem, PhD, FGA. Used with permission.
IGS Become Member