Schorl Crystal Group - NAM 036

Schorl crystal group with sprinkling of feldspar

Measurements:  48 x 43 x 33 mm 

Description:  A group of schorl crystals with good lustre, numerous small terminations and a generous sprinkling of feldspar.

The specimen has a few nicks, contact and pressure marks.

Weight of Specimen:  73.1 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:  NAM 036

R 80

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