Quartz, Prehnite and Calcite Crystals on Matrix - NBB 019

Measurements:  65 x 55 x 48 mm

Description:  A lovely arrangement of quartz, prehnite and calcite on a basalt matrix. 

The quartz crystal terminations have only  few minute nicks, otherwise there is some damage to the edges of the specimen. 

The specimen has been trimmed at the base to display better.

Weight of Specimen:  151.6 g

Chemical Composition:  SiO₂   (quartz)
                                      Ca₂Al₂Si₃O₁₀(OH)₂  (prehnite)                                                                 CaCO₃  (calcite)

Hardness on Mohs Scale:  (quartz)  7 
                                          (prehnite)  6-6.5
                                          (calcite)  3  
                                    
Location:  Brandberg, Namibia.

Specimen Code:  NBB 019

US $ 95