What is an automorphic crystal ?

Automorphic : definition

A term for a mineral forming a clearly defined crystal, limited by plane crystalline faces and drawing a clear geometric figure. Crystals with no sharp faces are called xenomorphic. Be careful, a xenomorphic mineral is still crystallized. Often the term "crystallized" is used instead of automorphic, it is however not suitable, because all minerals are crystallized, whatever their external appearance...
Automorh fluorite crystal from Spain