Schorl Crystal Group – NERS 008

Measurements:  48 x 43 x 26 mm

Description:  A lovely group of schorl crystals with the back of the specimen partly covered with (?)dolomite crystals, as well as a few bits of green (?)apatite. 

The specimen has a few nicks, with its back having a large nick.

Weight of Specimen:  81.0 g

Chemical Composition:  NaFe²⁺₃Al₆Si₆O₁₈(BO₃)₃(OH)₄  (schorl)
                                       CaMg(CO₃)₂  (dolomite)
                                        Ca₅(PO₄)₃(OH,F,Cl)  (apatite)

Hardness on Mohs Scale:  (schorl) 7.5
                                           (dolomite) 3.5-4
                                           (apatite) 5

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 008

US $ 45