Measurements: 58
x 44 x 43 mm
Description:
A specimen consisting of azurite (including several
nice crystals), duftite and bits of malachite in and on a (to us,
unknown)
mineral. We are not sure whether the unknown mineral plays host to the
other
minerals or whether it has partially replaced them.
The specimen has a few contact marks.
Weight
of Specimen: 46.0
g
Chemical Composition:
Cu3(CO3)2(OH)2
(azurite)
Cu2+(CO3)(OH)2
(malachite)
PbCu(AsO4)(OH)
(duftite)
Hardness on Mohs Scale:
(azurite)
3.5 – 4
(malachite) 3.5
- 4
(duftite)
4.5
Location:
Tsumeb, Northern
Namibia.
Specimen
Code: NTS 011
US
$ 45
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