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To find out more about the process
which tends to be a strong blue color
this unique Madagascar Agate rock specimen is perfect for gift giving or keep for yourself
As a Serpenti
Blue Hackmanite 6mm Round - 15-16 Inch 8x10 To find out more aboutDiscovered 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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