Geodes

Geodes are rare structures (1 in 8,000)

The geode's blocks can be any ore that spawns at the depth it spawns, including rare ores and special depth ores. (other than stone) Usually making a ball shape of a formation.

Trivia


 * There were so many bugs with geodes, and they would break all the time. Like ores generating inside the geode, Ores inside ores, Offset ores. Hopefully, these are all fixed.
 * There is an example of a geode on the surface, but we little do not know what ore that geode is made out of.

Here is an example of a special depth ore geode (already mined a little)