Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal Orthoceras was an ancient mollusk

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

Outback Jasper is a milky white to light pink to golden brown stone

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

Sunset Dumortierite has a much brighter palette than regular Dumortierite

Micas are fairly light and relatively soft

Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal Orthoceras was an ancient molluskDiscovered 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.