Opal Opal is indeed

As a kind of gem stone, Opal is silicon dioxide hydrate, popular talk is opal, transparent to slightly transparent, and was shiny glass, revealing a variety of colors such as gray, black, white, brown, Pearl bracelet pink, orange, and colorless and so on. It is worth noting: Because opal is not as crystal mineral crystal, so it does not have a definite shape, the fracture is conchoidal, mainly through the formation of silica colloidal precipitation. In other words, Opal is a silica gel or liquid infiltration of cracks and caves in the sedimentary strata formed amorphous solidified amorphous gem. If you settle in, such as colloidal silicon dioxide trees, crustaceans, and other biological Pearl pendant remains among the bones, you can create opal fossils, such as when it precipitated in the trees and the replacement of the Pearl necklace trees, xylem timeshare, they form a tree fossil -- - newspaper "liberal" version was April 26, 2008 and May 3, 2008 on the production of fossil trees in Myanmar made a series of reports, the text referred to the tree is indeed a major component of fossil opal.

"Opal," a name derived from Latin Opalus, while Opalus also from the Greek word Opalios. As for the Opalios, it is very likely to come from the Sanskrit word Upala, means "precious jewel" or "the beauty of precious stones set in a precious stone." It was also the Opal Opal translated in English as "Opal", which is expensive because the world's Opal (top grade Opal) produced mainly in Australia, Australians are really into it as Pearl ring a treasure.