Opals form when silica gel hardens in the cracks of other rocks. Most of the world's precious opal comes from Australia, where opal is the national gem. A boulder opal is an opal that has been sliced together with its surrounding ironstone for a varied look. Fire opal from Mexico comes in shades of orange and Peruvian opal is an opaque blue-green stone. An opal doublet has polished precious opal on the top with an ironstone backing added for strength, making the slice of opal less prone to chipping.
Derived from "tapaz," the Sanskrit word for fire, topaz is one of the most brilliant cut gemstones in existence. Topaz comes in a variety of colors from yellow to blue, and deeper blues and pinks are often created by heat-treating stones. Brazil is the world's top exporter of topaz.
This attractive opal stone is an authentic Australia fire flash black opal doublet that has a boulder ironstone backing. It is made with excellent quality blue-green opal with multi-color sparkles.
An "opal-doublet" has the polished precious real opal on the top and ironstone backing. As a result the slice of opal is thicker, stronger and less prone to chipping. As a rule, opal doublets are cheaper than solids, but this is not always the case. Some high quality doublets can be more expensive than lower quality solids, and this pendant contains a high quality doublet. GORGEOUS.<