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This macrocrystalline Quartz stone has chatoyant layers that create a flash which seems to emanate from within the stone as they catch the light
Madagascar
It is extremely fracture to resistant and has been used for blades and other tools since Neolithic times
Naturally occurring in hues of blue-green to green with spots and streaks of red
and can display a nearly emerald green color due to the presence of Chromium within the stone
Hackmanite 8mm Round - 15-16 Inch birthstone_crystal This macrocrystalline Quartz stone hasDiscovered 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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