Calcite

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

Obtaining
As of right now the only way to obtain calcite is by breaking it in its block form. This may be by simply mining it (information on that below) or exploding it in some fashion, be it with TNT or Creeper.

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