Amethyst Quartz Crystal – NBB 105

Description:  The upper part of the crystal has a nice amethyst colour. Most of the amethyst faces are pitted due to feldspar grains that got caught up in the crystal's surface when it formed, and when the feldspar withered, the minute holes remained. 

The lower section of the crystal is poorly formed but it has interesting feldspar growth which forms part of the crystal. The termination has a few very small nicks.

Chemical Composition:  SiO₂  (quartz
                                    KAlSi₃O₈ (feldspar)

Hardness on Mohs Scale:  (quartz)  7
                                      (feldspar)  6 - 6.5

Location:  Brandberg, Namibia 

Specimen Code:  NBB 105

US $ 10