Measurements:  38 x 31 x 28 mm

Description:  A neat, small geode of harlequin amethyst quartz crystals (up to about 20 mm long) together with botryoidal (?)calcite. The only apparent damage is to the edges.

A minute (1 mm) dark red / purple aggregate of an unknown mineral, makes interesting viewing through a 30x magnifying loop.

Chemical Composition:  SiO₂  (quartz)  
                                   CaCO₃  (calcite)  

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

Location:  Brandberg, Namibia

Specimen Code:  NBB 059