Magnetite - Carrière de la Brosse, Paulx, Loire-Atlantique,...
Magnetite crystals on serpentine gangue from the former La...
Original piece composed of calcite scalenohedrons whose interior is hollow (perimorphosis) and partially filled by other small rhombohedral crystals (a second generation of calcite or dolomite?). A few small quartz and micro-pyrites complete the ensemble.
7 x 3 x 2.2 cm
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Magnetite crystals on serpentine gangue from the former La...