Freeform shapes and Random shapes allow for the free-flow of energy within and around the mineral. The fact that their form is random and not cut to any specific shape allows the energies to be released in a very general and non-specific direction. Most freeform or random pieces are created from rough chunks of massive material, which ensures that all that is mined or extracted is used and never wasted. It also means that each piece is unique. Part polished slices or wedges of material have the dual benefit of one side being mirror-like and thus revealing the inner and outer beauty of the mineral, whilst the parts that are left raw allow one to see and marvel at the complexity of the "nooks and crannies" that are to be found with the rock. The rough faces of these pieces often have fascinating little nodules or drusy cavitites, giving an insight into how the mineral has grown within the earth.
Spheres, being regular and symmetrical in form, allow flow throughout 360 degrees, and so their flow is much less random than with freeforms and shapes. Spheres are especially nice to hold as meditation or healing pieces.