Minerals identify
Know how to recognize them
Cryolite
Halide mineral
Cryolite (Na 6, sodium hexafluoroaluminate) is an uncommon mineral on the west coast of Greenland , depleted by 1987.
Due to its rarity it is possibly the only mineral on Earth ever to be mined to commercial extinction.
Identification
Color of mineral
White
Brown
Red
Black
Mohs scale ( mineral hardness )
2.5
Density ( specific gravity )
1.3385
1.3389
1.3396
Luster ( interacts light )
Greasy
Vitreous
Pearly
Crystal ( diaphaneity )
Monoclinic