Opal Blog - Australian Opal Hunter

Opal is formed from low-temperature hydrothermal solutions or when groundwater leaches silica from the soil, leaving it behind in cracks deep within the earth after accumulated groundwater has evaporated. Visit only heritage opal site heritage listed , riches opal field on the world wide web www.graham black opal.com   , largest black opal found in modern times Guinness book of records Harleys comet black opal.  Most all of the world’s supply of precious opal comes from Australia, which is famous for its white and black precious opal. Hungarian opal comes from mines in the Czerwenitza area; fire opal, from Querétaro state in central Mexico. Within the U.S., opal has been found in Arizona, Oregon, Idaho, Nevada, and a few other states.