Quartz Crystal Cluster – NER 007

Measurements:  115 x 94 x 92 mm 

Description:   A cluster of clear quartz crystals on a quartz matrix, partly covered with feldspar and minute schorl crystals.

The two largest terminations have a few small nicks, while two other crystals have contact marks.

An unusual and nice specimen from the Erongo mountains that displays very well on a flat surface.

Weight of Specimen:  718 g

Chemical Composition:  SiO₂  (quartz)                 
                                       KAlSi₃O₈  (feldspar)   
                                       NaFe²⁺₃Al₆Si₆O₁₈(BO₃)₃(OH)₄  (schorl)
        
Hardness on Mohs Scale:  (quartz)  7          
                                          (feldspar)  6 - 6.5    
                                          (schorl)  7.5        

Location:  Erongo, Namibia.

Specimen Code:  NER 007

US $ 265