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RM2867   Siderite with pyrrhotite and dolomite

Mina Morro Velho, Nova Lima, Minas Gerais, Brazil

A classic specimen from this Brazilian locality. Various flattened, almost lenticular, siderite crystals with a yellowish green color, on which a group of dolomite crystals stands out. In dolomite we see numerous pseudohexagonal pyrrhotite crystals, some included in the dolomite. We did not observe the presence of cubanite.

Size: 5.5 x 3.8 x 2.4 cm.
Found in ±1985.

Col. Manchion (Barcelona).


RM2778   Quartz and lenticular siderite

Mina Morro Velho, Nova Lima, Minas Gerais, Brazil

A very aesthetic specimen from this classic Brazilian mine. Numerous aggregates of quartz crystals, with a very elongated prism, almost acicular, with well-defined terminal faces and exceptional luster and transparence. They form divergent aggregates on a siderite matrix, visible on the back, as lenticular crystals formed by flattened rhombohedra. Very aesthetic and huge size sample for this mine.

Size: 8.4 x 7.3 x 6.5 cm.