Quartz, Schorl and Feldspar – NAM 016

Measurements:  70 x 50 x 32 mm

Description:  Quartz crystals, with schorl inclusions and partially coated with hematite, share a conglomorate matrix with schorl and feldspar. 

The quartz crystals have a few nicks, but the large schorl crystal is badly damaged. 

Weight of Specimen:  87.5 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 mountains, Namibia.

Specimen Code:  NAM 016

R 120