Calcite

Calcite is a carbonate mineral found as part of amethyst geodes.

Breaking
Calcite drops as an item if mined by any pickaxe. If mined without a pickaxe, it drops nothing.

Natural generation
Calcite generates naturally as part of the structure of amethyst geodes, between the tuff and block of amethyst layers.

Usage
Calcite is currently used only for decoration.

History
Kalzit Calcite Calcita Кальцит 方解石