Selenite Tower (Satin Spar) Hydrated Calcium Sulfate (Gypsum): CaSO4·2H2O Mohs: 2. Size: 16cm x 5cm x 5cm Source: Selenite occurs on every continent and is the most common of all the Sulfate minerals. A Selenite Tower is a versatile crystal tool used for energy cleansing, meditation, healing and more. Selenite is a very powerful, high vibrational stone and activates the third eye, crown and soul star chakra. Selenite soothes the nerves and brings good luck and good fortune. It enhances concentration, awareness, clarifies your thoughts and expands your mental powers. A channeler and transmitter of energies. It cleanses and charges other stones. A natural environmental 'Record Keeper' and used in medicine wheels. Aids tissue regeneration to reduce the effects of a tumor, cancer, and signs of aging. Good for the brain. spinal alignment. digestion, strengthening bones, teeth, and fertility.