Prehnite, Calcite and Quartz on Matrix BARG 027

Prehnite, calcite and quartz crystals on calcite matrix

Measurements:  46 x 30 x 15 mm

Description:  Prehnite, calcite and small quartz crystals sit on a calcite matrix which has a thin coating at the bottom, of a blackish mineral, unknown to us. 

The only notable damage appears to be at the edges of the specimen.

Weight of Specimen:  20.8 g

Chemical Composition:  Ca2Al2Si3O10(OH)  (prehnite)  
                                     SiO2  (quartz)  
                                     CaCO3  (calcite


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

Location:  Brandberg, Namibia.

Specimen Code:  BARG 027

US $ 12

Home Order Form