Quartz and Schorl Crystals NAM 001

Quartz, schorl and feldspar crystal cluster

Measurements:  100 x 70 x 61 mm

Description:   A cluster of quartz, schorl and feldspar crystals. The schorl variety is foitite. Some crystals are partially coated with feldspar. 

Some of the crystals are broken or have nicks. The specimen displays well on a flat surface.

Weight of Specimen:  260 g

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

Hardness on Mohs Scale:  (quartz)  7
                                          (schorl)  7.5

                                          (feldspar)  6 - 6.5

Location:  Erongo, Namibia.

Specimen Code:  NAM 001 

R 120

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