Schorl, Quartz and Feldspar on Matrix NAM 005

Schorl, quartz and feldspar crystals on matrix

Measurements:  108 x 72 x 52 mm

Description:  Schorl, quartz and feldspar crystals on a quartz and feldspar matrix. 

Some of the crystals are damaged. The specimen displays well on a flat surface.

Weight of Specimen:  396 g

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                        SiO
2 (quartz) 

                                       KAlSi3O8  (feldspar)  

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

Location:  Erongo, Namibia.

Specimen Code:  NAM 005

R 150

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