A crystalized shape that is not symmetrical in any way.
This form shows a crystal of Barium Nitrate exhibiting isometric tetartohedral crystallization.
A crystalized shape, that is almost flat.
An example of sphenoidal crystallization is Iron-Copper-Sulfide (FeS_2_Cu), also known as chalcopyrite.
A Urea (CH_4_N_2_O) crystal exhibiting Sphenoidal Crystallization.