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Quartz and Epidote Crystals on Feldspar and Epidote Matrix - NBB 213

Quartz and gemmy, dark green epidote crystals on matrix



Measurements:  89 x 65 x 30 mm

Description:  Small, milky to clear quartz crystals, together with one larger quartz crystal (25 mm long), share a thin matrix of feldspar and epidote with small, gemmy, dark green epidote crystals.

There are also a couple of very small (weatherworn) prehnite crystals.

The specimen has very little damage and displays well. 

Weight of Specimen:  93.4 g

Chemical Composition:  SiO (quartz) 
                                       KAlSi3O8 (feldspar)                                                                                 Ca2Fe3+2.25Al0.75(SiO4)3(OH)  (epidote) 
                                        Ca
2Al2Si3O10(OH)  (prehnite)   

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

Location:  Brandberg, Namibia.

Specimen Code:  NBB 213

US $ 250 

                 

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