Smoky Quartz Crystals on Matrix – BARG 036

Measurements:  79 x 50 x 32 mm

Description:  A group of light smoky quartz crystals with some of them having patches of (?)chalcedony / hyalite opal on them, share a matrix of quartz and feldspar with a few pieces of schorl. Many of the crystals have multi-stepped facets.

The quartz crystals are generally in good condition, with only a few of them having small nicks. Damage to the specimen is mostly confined to its edges.

Weight of Specimen:  121.5 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, Namibia.

Specimen Code:  BARG 036

US $ 22