Quartz with Schorl - NER 073

Quartz crystal with schorl on its surface, and some inside

Measurements:  50 x 30 x 12 mm

Description:   A quartz crystal, with a piece of quartz attached, has numerous schorl needles on its surface, and some inside, with a few having both ends protruding through adjoining shaft facets.

The main quartz termination has a minute nick, while the lower part has a neat pressure mark. 

Weight of Specimen:  9.8 g

Chemical Composition:  SiO (quartz)   
                                       NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
Hardness on Mohs Scale: 
 (quartz)  7      
)  7.5                                     

Location:  Erongo, Namibia.

Specimen Code:  NER 073

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