Schorl Crystal Group – NERS 029

Schorl crystal group with several "mercedes" terminations

Measurements:  35 x 27 x 23 mm  

Description:  A group of schorl crystals with bits of feldspar. Several of the crystals have a "Mercedes sign" termination. 

It has a few contact and pressure marks and nicks.

Weight of Specimen:  29.9 g   

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                       KAlSi3O8  (feldspar)     

Hardness on Mohs Scale:  (schorl)  7.5
                                          (feldspar)  6 - 6.5
Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 029


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