Blue Topaz, Mwami, Hurungwe, Zimbabwe

This is a beautiful thumbnail size Blue Topaz from Mwami Hurungwe, Zimbabwe.

Crystal Dimensions: 

1.5cm (0.5”) x 1.5cm (0.5”)

Weight: 

1.8 grams 

Topaz is a silicate mineral of aluminium and fluorine.

The chemical formula is

Al₂SiO₄(F, OH)₂