Hackmanite | Afghanistan Orthoceras These volcanic-region minerals feature distinct

These volcanic-region minerals feature distinct

5” and weighs 7

25” and weighs 3

Deposited 250 million years ago during the Permian Period of geological time

This item is 3" x 2" and weighs 3

Hackmanite | Afghanistan Orthoceras These volcanic-region minerals feature distinctHackmanite is a fluorescent, phosphorescent and also tenebrescent (reversible photochromism) mineral found in Afghanistan. It can be deep pink, blue, or purple but quickly fades to colorless when exposed to sunlight. The original color can be restored quickly by exposure to short wave ultraviolet light, or more slowly by storing it in a dark space. This item comes in a perky box with 3 pieces included and weighs 0. 3 oz (2 of 5 for store purposes only)