Quartz, Calcite, Prehnite and Epidote on Matrix BARG 025

Yellow fluorite crystal specimen

Measurements:  87 x 58 x 21 mm  

Description:  Quartz and calcite crystals share a matrix of mixed minerals with prehnite and epidote. About three of the very small quartz crystals have reddish hematite specks and threads in them. 

Damage is limited to a few minute to very small nicks to the crystals, and damage to the edges of the specimen.

Weight of Specimen:  84.2 g

Chemical Composition:  SiO (quartz)
                                       Ca2(Fe3+, Al)3(SiO4)3(OH)

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

Specimen Code:  BARG 025

US $ 45

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