Schorl / Black Tourmaline Crystal on Feldspar Crystal – VAR 040

Black tourmaline crystal pair on well-formed feldspar crystal

Measurements:  33 x 25 x 22 mm 

Description:  A well-formed schorl crystal pair (main crystal 14 mm long) sits on / is partially embedded in a lovely, well-formed floater feldspar crystal, that has some traces of mica on its surface, giving it a few shiny patches. 

The specimen displays well on a flat surface, in a number of positions. The image (bottom left) shows one of the sides of the feldspar crystal.

The schorl crystals are not terminated, and has only a small nick (easily seen on these images). 

Weight of Specimen:  22.9 g 

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

Hardness on Mohs Scale:  (schorl /  black tourmaline7.5
                                          (feldspar)  6 - 6.5

Location:  Zimbabwe, Africa.

Specimen Code:  VAR 040

US $ 25

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