Group of Glossy Schorl Crystals on Matrix – NERS 007

Glossy schorl crystal group on matrix

Measurements:  133 x 69 x 50 mm

Description:  A group of glossy, jet-black schorl crystals (variety foitite) on a matrix of quartz and schorl. The specimen is partially covered with feldspar. 

The schorl group has no damage.

Weight of Specimen:  418 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 007

US $ 250 

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