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Opal - Gemstone Information - Ruby Mill
The majority of commercial opal comes from Australia (around 95%) other areas of supply are Brazil, Ethiopia, Guatemala, Honduras, Mexico (Mexican fire ...
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Chalcedony - Gemstone Information - Ruby Mill
Chalcedony is a group of cryptocrystalline quartz aggregates with a large number of varieties. Also described as microcrystalline or polycrystalline quartz, it comprises ... A chrysoprase matrix also occurs with brown or white markings. ...
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Peridot - Gemstone Information - Ruby Mill
Gemstone type: A variety of the fosterite species, from the olivine group of minerals. ... Pleochroism: Weak: typically pale green to yellowish-green. ...
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Chalcedony - Gemstone Information - Ruby Mill
A non-banded chalcedony with dendritic moss like inclusion of hornblende in a translucent near colourless material. Dendritic agate. A non-banded chalcedony ...
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