Blue Hackmanite 6mm Round - 15-16 Inch 8x10 It sometimes features dark brown

It sometimes features dark brown to black dendritic inclusions that branch like tiny tree limbs through the stone

As a Serpenti

which tends to be a strong blue color

Its colors include burnt red

Blue Hackmanite 6mm Round - 15-16 Inch 8x10 It sometimes features dark brownDiscovered 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.