Schorl Crystal Group with Multiple Terminations – NERS 011

Schorl crystal group with multiple terminations

Measurements:  86 x 63 x 52 mm

Description:  A group of schorl (variety foitite) crystals with a shiny, jet-black colour and multiple terminations. The specimen is partially covered with white to brownish feldspar and has a small piece of quartz conglomerate attached. 

The only damage is a few small nicks and damage where it parted from its matrix.

Weight of Specimen:  280.6 g

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                       SiO2  (quartz)            
                                       KAlSi3O8  (feldspar)

Hardness on Mohs Scale:  (schorl)  7.5
                                          (quartz)  7 
(feldspar)  6 - 6.5

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 011

US $ 125

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