Measurements: 47
x 32 x 22 mm
Description:
A geode consisting of malachite after azurite
crystals, on azurite,with some parts
coated with (?)chalcocite.
The
malachite crystals have a few nicks.
Weight
of Specimen: 50.7
g
Chemical
Composition: Cu3(CO3)2(OH)2
(azurite)
Cu2+(CO3)(OH)2
(malachite)
Cu2S
(chalcocite)
Hardness on Mohs
Scale: (azurite)
3.5 –
4
(malachite)
3.5
- 4
(chalcocite)
2.5
- 3
Location: Tsumeb, Northern Namibia.
Specimen Code: NTS 059
US $ 80
...
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