Draws of negative energies and stress of all kinds. It cleanses, purifies, and dispels and reorganizes anything within the body that is not in perfect order. It has a stabilizing effect assisting with balance and coordination. On a spiritual level, it also balances, grounding you to the physical plane while expanding your intuition.
They range in color from green, to turquoise to purple. Some are a single color, some contain all 3! Each one is randomly chosen so no guarantee in color. Most important quality is the energy it gives off, not the exact color.