Selenite Twin Lamp-12” crystalWidth: 5. 5 Selenite is a powerful crystal that is believed to have strong metaphysical properties. It is believed to bring mental clarity, help with spiritual growth, and bring peace and harmony. Selenite can be used to clear negative energy from the aura and to amplify the energy of other stones. The twin lamp form of selenite is also believed to help balance the energies of the individual and their environment, and can be used as a tool for