Schorl Crystals on Feldspar Matrix – NERS 010

Jet black schorl crystals on white feldspar matrix, floater

Measurements:  47 x 32 x 18 mm

Description:  A few well-formed, mostly double terminated schorl (black tourmaline) crystals sit on a matrix of white feldspar, which has a nice shimmer to it, better seen when looked at through magnification. 

The bottom of the specimen is mostly feldspar with interesting formation, with a few of the schorl crystals showing through. Please see all images on the right - the one on the bottom has been magnified much more than the others.

Most of the crystals have a few small nicks.

Weight of Specimen:  16.4 g

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

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

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 010



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