Blue Topaz, Mwami, Hurungwe, Zimbabwe

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

Crystal Dimensions:

2cm (0.7”) x 1cm (0.3”)

Weight: 

3.9 grams  

Topaz is a silicate mineral of aluminium and fluorine.

The chemical formula is

Al₂SiO₄(F, OH)₂