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RM1857   Talmessite with cobaltoan calcite

Agoudal, Bou Azzer, Ouarzazate, 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.


RM1461   Calcite

Agoudal Mines, Bou Azer, Agoudal, Ouarzazate, Drâa-Tafilalet, Morocco

Very aesthetic calcite specimen showing groups of scalenohedral sharp crystals, with transparence that allow to see reddish geometric inclusions. On a matrix with chalcopyrite and marcassite. Ver unusual for the locality.

Size: 7.5 x 4.7 x 3.5 cm.
Main crystal: 20 x 10 mm.
Found in 2016