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Boulder Opal Cabochons, Page 2These opals are found in Australia. Boulder Opal is a thin layer of
opal that is within a very tough stone composed mostly of iron. Because
the layer of color is thin, the surface of the stone is often irregular
and the brown matrix will be exposed in spots. Because of the strength
of the iron matrix this stone is very durable.
Boulder Opal Cabs Page 1
Opal, Fact and Fancy Email: jan@designjewel.com Links to the the other Cabochon Pages |