Big Aquamarine Crystal with Schorl –  NERA 012

Measurements:  50 x 23 x 21 mm 

Description:  A nice, big aquamarine crystal, with a gemmy termination and a few small schorl crystals partly embedded in its surface. There are bits of white feldspar attached to some surfaces.

The back of the specimen has a large pressure mark, while the lovely termination has only a few minute nicks. 

Weight of Specimen:  51.4 g

Chemical Composition:  Be₃Al₂Si₆O₁₈  (aquamarine) 
                                       NaFe²⁺₃Al₆Si₆O₁₈(BO₃)₃(OH)₄  (schorl)    
                                       KAlSi₃O₈  (feldspar)  

Hardness on Mohs Scale:  (aquamarine) 7.5 - 8.0
                                          (schorl)  7.5                                      
                                          (feldspar)  6 - 6.5

Location:  Erongo, Namibia.

Specimen Code:  NERA 012

US $ 220