Fluorite, Schorl and Feldspar NAM 006

Fluorite and schorl crystals on a feldspar matrix

Measurements:  140 x 100 x 80 mm

Description:  Fluorite and schorl crystals share a feldspar matrix. The large schorl crystal (45 mm long) has very small goshenite crystals on its termination, and has no notable damage. 

The rest of the specimen has very little damage, only a few nicks and flaws.

Weight of Specimen:  854 g

Chemical Composition:  CaF2 (fluorite)       
                                       NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                        KAlSi3O8 (feldspar)
3Al2Si6O18 (goshenite) 

Hardness on Mohs Scale:  (fluorite)  4                                                                                         (schorl)  7.5
                                           (feldspar)  6 - 6.5
                              (goshenite)   7.5–8

Location:  Erongo, Namibia.

Specimen Code:  NAM 006


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