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Stone's names: Aventurine, avanturine.
Aventurine is a soft green semi-translucent to mostly opaque stone with mica
flecks. Aventurine also comes in silvery, yellow, reddish brown,
greenish-brown, bluish green and orange. It contains inclusions of small
crystals that reflect light and give a range of colors. Aventurine is
composed of two gem minerals, one is a plagioclase feldspar and the other is
quartz . Both have a sparkling reflection from oriented minute inclusions of
mica or hematite, which cause a slight metallic iridescence.
From the stone history: For many centuries aventurine is used for jewelry,
candelabra, girandoles, pipes, vases and bowls (sometimes very large), and
for other ornamental objects. Unique ancient vase made of bright aventurine
is displayed in Hermitage, art museum in St. Petersburg (Russia).
Aventurine is found in Brazil, India, China, Japan, Russia, Tanzania, and
USA. Extensive beds in mica schist occur in the Russian Ural Mountains.
Green aventurine, colored by a chrome mica, has been found in the state of
Tamil Nadu (formerly Madras), India, China, and in Rutland (Vermont).
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