Smoky Quartz Crystal with Schorl Inclusions - NER 053

Measurements:  62 x 17 x 12 mm

Description:  A smoky quartz crystal with several needle-like schorl crystals in and on it, with several protruding through the surface.

Weight of Specimen:  22.5 g 

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

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

Location:  Erongo, Namibia.

Specimen Code:  NER 053