What mineral has a rhombic cleavage?
An example of rhombic cleavage would be siderite and rhodochrosite. Remember that this is basically a “partically squashed box.” Essentially, the direction of deformation in a rhombohedron occurs in one of the three diagonals that run from one corner of the cube to the other. Calcite is not a particularly fabulous example of a rhombohedron, because it is considered to be cubed.
