Natural Selenite Crystal Sticks, Wands, Rulers, Satin Spar Healing Crystals. Natural Healing Crystal Collection Natural Satin Spar Selentie crystal rods, cut into lengths of 3-5cm, 10cm and 20cm.Many refer to these as rods, sometimes as rulers, and occasionally as sticks. They are very popular to be used as healing wands for the aura, and as crystal grids, where the rods are laid out to form patterns and energy currents. Remember Selenite is brittle and does shed tiny crystals on occasion. Selenite should not be cleansed with water, as water will erode the crystal structure.