Unusual Specimen Quartz Crystal on Calcite Matrix - NBB 056

Measurements:  50 x 41 x 26 mm

Description:  A light amethyst quartz crystal (41 x 6 x 5 mm) neatly embedded on top of a matrix consisting of calcite and, what appears to be (?)chalcedony, with hematite specks and very small quartz crystals, some with hematite inclusions.

The main crystal has a few minute nicks to the termination and damage where it broke off from where it had been attached. The matrix has a bit of damage where it was attached to the mother rock.

A rather unusual specimen!

Chemical Composition:  SiO₂  (quartz & chalcedony)
                                   CaCO₃  (calcite) 
                                 
Hardness on Mohs Scale:  (quartz)  7                                                                                  (calcite)  3
                                      (chalcedony)  6.5 - 7 

Location:  Brandberg, Namibia

Specimen Code:  NBB 056

US $ 125