Fluorite on Schorl, with Hyalite OpalNERF 013

Fluorite crystals on schorl, with hyalite opal

Measurements:  53 x 45 x 43 mm

Description:  Fluorite crystals with bits of purple colouring, sit on a group of schorl crystals (variety foitite). The schorl crystals have feldspar attached to some surfaces, as well as bits of hyalite opal. 

The fluorite has a few small nicks, while some of the schorl crystals are damaged. 

Weight of Specimen:  80.5 g

Chemical Composition:  CaF2  (fluorite)
                                       NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                       KAlSi3O8
 (feldspar) 
                                       SiO2•1.5(H2O) 
(opal)

Hardness on Mohs Scale:  (fluorite)  4
                                          (schorl)  7.5
                                          (feldspar)
  6 - 6.5                                                                              (opal)  5.5-6     

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERF 013

US $ 65

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