Measurements:
51 x 37 x 35 mm
Description: A group of unusually formed schorl crystals (variety foitite) with goshenite crystals.
The foitite crystals are not black, but rather a very dark other colour (difficult to determine). The goshenite crystals are mostly double terminated.
This unusual, rare specimen has very little damage, only a few nicks.
Weight
of Specimen: 45 g
Chemical
Composition: NaFe2+3Al6Si6O18(BO3)3(OH)4
(schorl)
Be3Al2Si6O18 (goshenite)
Hardness
on Mohs Scale:
(schorl)
7.5
(goshenite) 7.5–8
Location: Erongo,
Namibia.
Specimen
Code: NAM
011
R 350
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