- Origin: Brazil
- Size: H12cm W28cm D18cm
- Description: Freestanding quartz with drops of calcite overgrown.
- Additional information:
- Quartz has attracted attention from the earliest times; water-clear crystals were known to the ancient Greeks as krystallos—hence the name crystal, or more commonly rock crystal, applied to this variety.
- Calcite, the most common form of natural calcium carbonate (CaCO3), a mineral known for the beautiful development and great variety of its crystals. It is polymorphous (same chemical formula but different crystal structure) with the minerals aragonite and vaterite and with several forms that apparently exist only under rather extreme experimental conditions.