- Calcite, Quartz (Var: Amethyst)
- Large Cabinet, 21.9 x 17.4 x 9.4 cm
- Irai, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil
Amidst a field of lustrous, bright purple amethyst crystals, a large, lone scalenohedron of silky calcite rises, to a height of 7 cm. The calcite is translucent, actually transparent in the center but with ornate stepped modifications on the faces that give it a silky appearance. A large, pretty and quite dramatic specimen.