Fluorite, Schorl and Hyalite Opal on Matrix NAM 003

Fluorite, schorl and hyalite opal on matrix

Measurements:  73 x 50 x 47 mm

Description:  A group of fluorite and schorl with a capping of hyalite and bits of mica, on a feldspar matrix.

The only notable damage is to the lower parts. 

Weight of Specimen:  148.4 g

Chemical Composition:  CaF2 (fluorite) 
                                        NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
2•1.5(H2O) (basic opal)  
2(Si3Al)O10(OH,F)2 (muscovite)
                                        KAlSi3O8 (feldspar)

Hardness on Mohs Scale:  (fluorite)  4
                                          (schorl) 7.5

                                          (basic opal) 
5.5 - 6 
                                          (feldspar)  6 - 6.5

Location:  Erongo, Namibia.

Specimen Code:  NAM 003

R 600


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