Measurements: 55 x 27 x 19 mm
Description: A quartz crystal, with a smaller one partially embedded ion one of its sides, has a number of schorl crystal inclusions.
The terminations have only very small nicks.
Weight of Specimen: 31.5 g
Chemical
Composition: SiO2
(quartz)
NaFe2+3Al6Si6O18(BO3)3(OH)4
(schorl)
Hardness
on Mohs Scale: (quartz) 7
(schorl) 7.5
Location: Erongo mountains, Namibia.
Specimen Code: NAM 023
R 80
.
.
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