Quartz Crystal Group – NBB 153

Measurements:  83 x 48 x 25 mm

Description:  A group of clear quartz crystals, some with bits of red hematite inclusions. There are a few small prehnite crystals and white feldspar among the crystals, also a few very minute bits of epidote. 

Some of the crystals are damaged. The specimen displays well on a flat surface.          

Weight of Specimens:  79.7 g

Chemical Composition:  SiO₂  (quartz)
                                       Ca₂Al₂Si₃O₁₀(OH)₂   (prehnite) 
                                        KAlSi₃O₈ (feldspar) 

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

Location:  Brandberg, Namibia.

Specimen Code:  NBB 153

US $ 75