Measures 3.5 inches in length. Aura crystals are real, natural crystals that have been lightly treated with platinum/titanium to give them their unique, beautiful rainbow finish. It absorbs and neutralises negative energy and stress. An excellent learning aid, Fluorite increases our powers of concentration, self-confidence and helps us in decision-making. It encourages positivity, balances the energies, and improves balance and coordination, both physically and mentally.