Amethyst Quartz Crystal on Calcite Matrix - NBB 086

Description:  A lovely, undamaged quartz crystal sitting on a small calcite matrix. Some of the crystal faces have a very thin coating of iron oxide.

Weight of Specimen:  8.5 g

Chemical Composition:  SiO₂  (quartz)                                                                                       CaCO₃  (calcite)  

Hardness on Mohs Scale:  (quartz)  7 
                                      (calcite)  3

Location:  Brandberg, Namibia.

Specimen Code:  NBB 086