Topaz and Schorl on Matrix - NER 028

Topaz crystal and schorl crystals on feldspar matrix

Measurements:  60 x 25 x 22 mm

Description:  A small, neat topaz crystal (12 mm wide) shares a feldspar matrix with schorl crystals. 

The topaz crystal has only minute nicks (hardly visible with the naked eye), while some of the schorl crystals are damaged.

Weight of Specimen:  43.3 g

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl )   
2SiO4(F,OH)2 (topaz)
Hardness on Mohs Scale:  (schorl ) 7.5
                                        (topaz) 8                                 

Location:  Erongo Region, Namibia.

Specimen Code:  NER 028

US $ 35

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