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Measurements: 83
x 60 x 37 mm Description: A rarity from
the Kalahari Manganese Fields is quartz on manganite. Gemmy quartz
crystals, up
to 18 mm long, sit on a matrix of manganite and, what appears to be,
iron
ore. The quartz
crystals are mostly blueish / grey and have a fine scattering of
manganite on
them. A small section of the quartz crystals have a yellow coating of
an
unknown mineral. There is
limited damage were the specimen parted from its mother rock. Weight of Specimen: 162.1
g Chemical Composition: SiO2 (quartz)
Hardness on Mohs
Scale: (quartz)
7 Specimen
Code:
SKMF 022 . . . ..
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