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Monte Ramazzo mine, Genova, Italy

The Monte Ramazzo mine is a pretty old one dating back to 1465, mining already stopped in the first decades of the 1800ies. Mined was copper, iron sulphates and later also magnesium sulphate hosted in serpentinite bodies. The sulphate mining indicates the state of the ore material to be found there: it is very, very weathered. Even the massive looking stuff is fractured and needs to be impregnated with resin before polishing.

A polished endpiece of the ore. Visible are pyrrhotite in a mass of magnetite:

MteRamazzo_1

MteRamazzo_1a

Some microfotos from the sample above. Most of the material consists only of pyrrhotite (Po), magnetite (Mag) and valleriite (Val). Nic //, Obj. 20x, 100 µm bar, air:

00001t

Same as above, but with crossed polarizers. Beginning replacement of pyrrhotite by valleriite along thin veins. Nic +, Obj. 20x, 100 µm bar, air:

00002

Magnetite and some remaining pyrrhotite in a mass of valleriite. Nic //, Obj. 20x, 100 µm bar, air:

00011

Nic //, Obj. 20x, 100 µm bar, air:

00013

Note the textures in the fotos below. Nic //, Obj. 20x, 100 µm bar, air:

00014t

Same as above, but with crossed polarizers. Nic +, Obj. 20x, 100 µm bar, air:

00015

Nic //, Obj. 20x, 100 µm bar, air:

00016

Nic //, Obj. 20x, 100 µm bar, air:

00018

Most of the pyrrhotite is here already replaced by valleriite. Nic //, Obj. 20x, 100 µm bar, air:

00021


An other one with a mass of magnetite with pyrrhotite:

MteRamazzo_4

MteRamazzo_4a

MteRamazzo_4b

MteRamazzo_4c

Serpentinite, mineralized with magnetite. Note the structure! The photos where processed in order to make details visible. The original is darker than shown here.

MteRamazzo_2

MteRamazzo_2a

MteRamazzo_2b

For further informations on the region this article might be interesting:

Pipio, G.: La valleriite-tiariocronio di Monte Ramazzo (GE). Rivista Mineralogica Italiana.(1986).No. 1.30-35.