Measurements: 125
x 97 x 55 mm
Description:
A delicate specimen consisting
of botryoidal plancheite / shattuckite with two malachite crystals,
with a
conglomerate matrix of plancheite / shattuckite, quartz and malachite.
It
is obvious that this specimen was removed fairly close to the
surface, as it has a few small plant roots embedded in its
base
(photograph bottom, left).
The
specimen, which displays well on a flat surface, has some damage to
the malachite and to the edges. A small part was cut /trimmed at the
top,
probably to remove unwanted matter (see image bottom right, close
to centre of photograph).
Weight of Specimen: 390.0
g
Chemical
Composition: Cu5(OH)2(SiO3)4 (shattuckite)
/
Cu8Si8O22(OH)4•(H2O)
(plancheite)
Cu2+(CO3)(OH)2 (malachite)
SiO2 (quartz)
Hardness
on Mohs Scale: (shattuckite) 3.5
(plancheite) 5.5
(malachite) 3.5-4
(quartz) 7
Location: Kaokoland,
Specimen
Code: NKO 015
US
$ 225
.
.
.
.
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