Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal Turquoise is one of the

Turquoise is one of the oldest known gemstones

Orthoceras was an ancient mollusk that lived over 370 million years ago

Peridot is one of few stones that occurs naturally in only one color

manganese and other metallic oxides captured during the forming of the rock

Micas are fairly light and relatively soft

Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal Turquoise is one of theDiscovered 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.