Schorl and Quartz NAM 032

Well-formed shorl crystal cluster with small quartz crystals

Measurements:  37 x 26 x 21 mm

Description:  A cluster of well-formed schorl and small, light smoky quartz crystals, on a feldspar matrix.

The edges of specimen has contact and pressure marks.

Weight of Specimen:
 
24.5 g

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

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

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NAM 032

R 65

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