Hackmanite 6mm Round - 15-16 Inch Diamond It is a particularly unusual

It is a particularly unusual gem because it exhibits a special optical property known as tenebrescence

Gem Silica is the rarest and highest form of Chrysocolla

creating a unique "marbled" look

red and magenta hues

The folding stations are designed to fit three different size crimp tubes (1

Hackmanite 6mm Round - 15-16 Inch Diamond It is a particularly unusualDiscovered 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.