Hackmanite 8mm Round - 15-16 Inch Stone Type_Emerald and pattern

and pattern

brown and gray

Blue Tiger Eye is a naturally occurring dark stone with chatoyant layers that create a flash which seems to emanate from within the stone as they catch the light

The yellowish colors of heliodor are usually caused by small amounts of iron within the mineral's crystal structure

Hackmanite 8mm Round - 15-16 Inch Stone Type_Emerald and patternDiscovered 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.