Fluorite Crystals on Mica, Feldspar and Schorl - NERF 034

Fluorite crystals on conglomerate of muscovite, feldspar and schorl

Measurements:  42 x 25 x 13 mm

Description:  Green fluorite crystals (up to 5 mm on edge), a few with bits of purple colouring, rest on a conglomerate of feldspar, mica and schorl.

There is only limited damage to the fluorite crystals at the edges of the specimen.

Weight of Specimen:  16.2 g

Chemical Composition:  CaF2  (fluorite) 
                                   KAlSi3O8  (feldspar) 
                                   KAl2(Si3Al)O10(OH,F)2  (mica
                                   NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl 

Hardness on Mohs Scale:  (fluorite) 
                                      (feldspar)  6 - 6.5
                                      (schorl ) 7.5

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERF 034

US $ 35

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