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Measurements:
49 x 30 x 25 mm Description: A
layer of botryoidal,
velvety
blue chalcedony on a matrix of manganese. The white mineral
could
possibly be calcite. The only damage is to the edges of the
specimen. Weight of Specimen: 34.4 g Chemical
Composition:
SiO2 (chalcedony) Hardnesson
Mohs Scale:
(chalcedony) 6.5
to 7 Location:
N'Chwaning 3, Kalahari
Manganese Specimen
Code:
SKMF 017
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