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it is a relative newcomer to the gem market
Ruby was valued more highly than any other gem
it is cut and polished to look just like a Quartz gemstone
The first rough material was offered for sale in Tucson in 2011 and is now regularly mined at the remote deposit site in Sonora
Prehnite Natural 6-7mm Table Cut Cube A Grade - 15-16 Inch hps_05232024 it is a relative newcomerPrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.
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