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

creating a unique "marbled" look

commonly with inclusions of copper in speckled patterns throughout the stone

At that time yellowish gems were called "topaz" in many parts of the world

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.