- Calcite, Quartz (Var: Amethyst)
- Large Cabinet, 28.5 x 23.4 x 9.1 cm
- Rio Grande do Sul, South Region, Brazil
This spectacular showpiece was probably trimmed from the inside of a giant geode, and considered more valuable as a large cabinet specimen than as a huge geode. It features an 11-inch band of fabulous calcite crystals, to 4.5 cm in height, bursting in all directions and running right through the middle of this large plate of very gemmy, razor-sharp and glass-lustered amethyst crystals.