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

Sunset Dumortierite has a much brighter palette than regular Dumortierite

Hematite within the stone is responsible for its reddish and rusty colors

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

this unique Madagascar Agate rock specimen is perfect for gift giving or keep for yourself

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.