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Measurements:
36
x 35 x 32 mm Description:
A lovely arrangement of small black tourmaline (schorl) crystals with
feldspar.
A few of the crystals have damage. Weight
of Specimen: 37.5 g Chemical
Composition:
NaFe2+3Al6Si6O18(BO3)3(OH)4
(schorl) Hardness
on Mohs Scale: (schorl)
7.5 Location: Specimen
Code:
NERS 009 US $ 25 .. . . .
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