Measurements: 40 x 28 x 16 mm
Description: A
good and undamaged example of malachite after
azurite. The small matrix appears to be calcite and duftite. The
crystal has
bits of a (to us, unknown) mineral coating.
Weight
of Specimen: 19.7 g
Chemical Composition:
Cu3(CO3)2(OH)2
(azurite)
Cu2+(CO3)(OH)2
(malachite)
PbCu(AsO4)(OH)
(duftite)
CaCO3 (calcite)
Hardness on Mohs Scale:
(azurite)
3.5 – 4
(malachite) 3.5
- 4
(duftite)
4.5
(calcite)
3
Location: Tsumeb,
Northern
Namibia.
Specimen
Code: NTS 033
US
$ 200
|