Fluorite and Muscovite on Schorl NERF 011

Greenish fluorite crystals and muscovite on schorl crystal

Measurements:  32 x 11 x 10 mm

Description:  A few small, greenish fluorite crystals, together with bits of muscovite, sit on a schorl crystal with a partial coating of hyalite opal on its shaft. 

The specimen has a few minute nicks. 

This type of specimen from Erongo is currently very difficult to obtain.

Weight of Specimen:  5.5 g

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

                                     SiO2•1.5(H2O)  (opal)

Hardness on Mohs Scale:  (fluorite)  4
                                        (muscovite)  2-2.5

                                        (opal)  5.5-6 

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERF 011


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