Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal inclusions of Goethite or Hematite

inclusions of Goethite or Hematite refract the light between the layers of the crystal

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

Micas are fairly light and relatively soft

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

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

Hackmanite 8mm Round - 15-16 Inch Blue Peru Opal inclusions of Goethite or HematiteDiscovered 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.