Prehnite and Quartz Cluster - NBB 025

Beautiful Prehnite and Quartz Cluster with Small Matrix

Measurements:  37 x 26 x 18 mm

Description: A beautiful cluster of quartz crystals on a druse of prehnite and a small piece of calcite. The limited matrix is basalt (see bottom photograph, left). 

There is some damage to the base of the two largest quartz crystals where they were attached to the mother rock. 

Weight of Specimen:  10.4 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 025

US $ 75



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