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Green Aventurine
Treated quartz that results in a unique blue color
It is an energy booster
Agate is one of many varieties of banded Chalcedony
Blue Hackmanite 6mm Round - 15-16 Inch Stone Type_Rhyolite Green AventurineDiscovered in Greenland in the late 1890's, hackmanite is named for Finnish geologist Victor Hackman. It is a rare occurrence to find gem grade hackmanite; at best, most crystals are translucent. Hackmanite is the light pink to pale violet variety of sodalite. It is a particularly unusual gem because it exhibits a special optical property known as "tenebrescence," a type of reversible photochromism. Hackmanite is very reactive under UV light.
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