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2011 January
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Picture of the day
A sample of
malachite
, a green
copper
carbonate mineral
that
crystallizes
in the
monoclinic crystal system
. It is typically associated with copper deposits around
limestone
, and is often found together with
azurite
. Malachite was used as a mineral pigment in green
paints
from antiquity until about 1800, and is still used today for decorative purposes and to make
jewelry
.
Photo:
JJ Harrison
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