Cleavage or Fracture? does it have both?
Cleavage means a mineral breaks into straight or flat sides. Fracture means the exact opposite; minerals that cannot/will not break along a flat edge.
Sphalerite can have both.
Cleavage - all sides that often form a dodecahedron Yes.
Fracture - Conchoidal Yes.
Sphalerite can have both.
Cleavage - all sides that often form a dodecahedron Yes.
Fracture - Conchoidal Yes.