Aquamarine, Schorl, and Feldspar Crystal Specimen – NERA 011

Measurements:  53 x 46 x 28 mm 

Description:  A light blue aquamarine crystal (18 x 15 x 12 mm) sits to the side of a group of schorl and feldspar crystals. The latter is partly coated with very minute greenish / yellowish crystals of a (to us, unknown) mineral.

The aquamarine crystal has only a few very small nicks, while the schorl crystals also have very little damage.

The specimen displays well on a flat surface.

Weight of Specimen:  57.0 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, Africa.

Specimen Code:  NERA 011

US $ 125

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