Dims: 16.4"x9.0"x6.2" (41.6x22.9x15.7cm)
Wt: 20lbs (9.1kg)
Minas Gerais, Brazil
This amethyst cathedral has an outer layer about ½ inch thick of agate, then another ½ inch of colorless quartz, and the interior surface is medium colored amethyst crystals. They are relatively small, as expected in a geode with this thin of a shell. Three is a bonus of a large calcite cluster. The calcite crystals are rounded and blocky, looking more like a "blob" than a crystal cluster, and there is a fine druze of tiny crystals lending sparkle to the calcite.