- Siderite, Pyrrhotite, Cubanite
- Small Cabinet, 8.8 x 5.1 x 2.4 cm
- Morro Velho mine (incl. Mina Velha; Mina Grande), Nova Lima, Iron Quadrangle, Minas Gerais, Southeast Region, Brazil
A classic, superb specimen of highly lustrous and translucent, shimmering tan-colored siderite rhombs (flattened so they look like discs) in an arborescent cluster. These specimens, of a very characteristic style and habit, were found in the 1960s at this famous gold mine. The edges are festooned with small brassy, tabular crystals of both cubanite (more erratically formed or acicular crystals) and pyrrhotite (sharply hexagonal). The larger hexagonal crystal of pyrrhotite (about 1 cm) .