Description

Hackmanite is a rare sulfur chloric sodium aluminum silicate member of the Sodalite family. It crystallizes in the form of masses, cubic and octahedral formations. This is one of the very few minerals that is tenebrescence (changes color when exposed to sunlight), as well as UV reflective. It can be seen in a variety of colors such as grey, green, yellow, violet, pink, and blue, but most commonly found in a dusty white. Hackmanite was first discovered in Greenland by L.H. Borgstroem in 1901. He named it after the famed Finnish Geologist, Victor Axel Hackman. Important deposits of Hackmanite are located in Afghanistan, Myanmar, Canada, Norway and Russia.