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RM1857   Talmessite with cobaltoan calcite
#1466
Agoudal Mines, Bou Azzer area, Tansifte Caïdat, Agdz Cercle, Zagora, Drâa-Tafilalet, Morocco

Very curious globular aggregates formed by prismatic crystals that vary their composition according to the zone, although the XR diffraction study shows that it is talmessite, without discarding that in some parts of the aggregate a higher cobalt content is observed. These aggregates are disposed on a matrix of cobaltoan calcite, together with manganese oxides. Very interesting.

Size: 6.8 x 5.5 x 3.6 cm.
Main crystal: 12 x 11 mm aggr.
Found in 2018.
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