Ethiopia A large oval cabochon opal having a rich caramel brown body color, with an intense, firey...
By Peter Eccles Australian goldsmith, Peter Eccles, utilized a natural Australian gold nugget with...
By Peter Eccles Australian goldsmith, Peter Eccles, utilized a natural Australian gold nugget with...
An antique box, formed of slabs of polished goldstone glass, bordered in gilt-washed fittings...
Ligthning Ridge, New South Wales, Australia Swirls of vivid green, blue, black, orange, pink appear...
Lightning Ridge, New South Wales, Australia An oval cabochon of suitable size for mounting as a...
Lightning Ridge, New South Wales, Australia An oval cabochon of solid crystal opal with a...
Lightning Ridge, New South Wales, Australia A large oval cabochon black crystal opal having full...
Lightning Ridge, New South Wales, Australia Featuring a stunning oval black opal cabochon, weighing...
Lightning Ridge, New South Wales, Australia Featuring an rectangular cabochon black opal, which...
Lightning Ridge, New South Wales, Australia Featuring an oval cabochon black opal with a broad flash...
Lightning Ridge, New South Wales, Australia An oval cabochon of classic color and proportions...
Lightning Ridge, New South Wales, Australia An oval cabochon black opal with multi-color...
Lightning Ridge, New South Wales, Australia An oval cabochon black opal having predominantly red...
Virgin Valley, Humboldt County, Nevada The present specimen has very fine black body color and vivid...
Andes Mountains, Peru Comprising 53 hexagonal opal beads of sea foam blue color, with excellent...
Burma Of oval lenticular form, this fine double-sided cabochon of rich, medium blue color with a...
Formed of flat polished panels of fine quality Queensland, Australia boulder opal, book-matched to...
Koroit, Queensland, Australia Having a contour polished face with a manganese-rich, brown ironstone...
Korioit, Australia A tear-drop shaped cabochon of rich, brown ironstone having excellent minute...
Koroit, Queensland, Australia Set with seven cabochon boulder opals, of either oval, triangular or...
Queensland, Australia Idar-Oberstein, Germany Retailed by H. Stern Carved from a single piece of...
Consisting of polished panels of Queensland, Australia boulder opal, intricately inlaid to create a...
Quilpie, Queensland, Australia Thick seams of iridescent opal in blue, green and orange are seen in...
Queensland, Australia A rectangular plaque with contour polished face which reveals multi-color...
Queensland, Australia The face of this attractive specimen is almost entirely covered by a thick...
Queensland, Australia Made by an Australian artist, this unique waterfall feature incorporates...
Serro Do Caldeirao, Pontes e Lacerda, Mato Grosso, Brazil Mining in the greater Mato Grosso region...
Queensland, Australia A vivid blue layer of opal, known in the mineral hobby as a "pipe", with...
S. Fork Stanislaus River, Columbia Mining District, Tuolumne Co., California A fine specimen...
16 to 1 Mine, Alleghany Mining District, Sierra County, California An arborescent specimen of "tree...
Eagle's Nest, Michigan Bluff, Placer County, California An exquisite miniature specimen with...
Colorado Quartz Mine, Mariposa County, California Minute crystallization of exquisite form...
Colorado Quartz Mine, Mariposa County, California A classic example with unbelievable luster, the...
Harvard Mine, Jamestown Mining District, Tuolumne Co., California Comprising bright, lustrous gold...
Placer County, California A classic river tumbled nugget with excellent three-dimensional form...
A beautiful water-worn nugget having traces of quartz and oxides in the crevices. Weighing...
An alluvial nugget of great character with a naturally pierced hole and minor oxides in the...
Harvard Mine, Jamestown Mining District, Tuolumne County, California An exquisite thumbnail specimen...
By Paul Dreher Idar-Oberstein, Germany Retailed by Asprey, London, England circa 1990 Carved from a...
By Christine Roussel A crystal opal with some transparency having extensive bluish-green fire...
Idar-Oberstein, Germany, Retailed by Asprey and Co An impressive depiction of a bird of large size...
Idar-Oberstein, Germany Circa 1980 Retailed by Vacheron Constantin, Geneva, Switzerland Carved from...
Brazil An oval cabochon cat's eye aquamarine having a well-saturated sea blue color and good luster...
Burma Danburite is a silicate mineral found scattered throughout the planet in unassuming colors...
Ural Mountains, Russia The phenomenon of chatoyancy is rarely seen in the mineral nephrite. The...
Arusha, Tanzania A large, deep cabochon which displays not only very fine, rich violet hue but also...
Lightning Ridge, New South Wales, Australia Vivid and truly "present" color in opal is rarely seen...
Lightning Ridge, New South Wales, Australia An oval cabochon having a semi-black black body color...
Lightning Ridge, New South Wales, Australia A classic, true black "nobby" opal (i.e. an opal...
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