The organic gem coral is the skeleton of coral polyps which live in the sea. Dull when harvested, it can be polished to a high shine. Red and pink varieties are generally found in warm Asian and Mediterranean waters. Coral has been carved in China for 2,000 years and was used medicinally and as an amulet in other ancient cultures. Sea bamboo is a vivid red gem from the coral family. Fossilized coral dates from the Ordovician period of prehistory and displays beautiful colors and a gorgeous starburst pattern when polished.
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.
Copal is fossilized plant sap that did not fully harden into amber.
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.<