These large pieces of Satin Spar (Selenite) are all approx 10cms long and avg approx 1.5-2cms thick. They are flat pieces and are excellent for many situations including using to block EMFS around the home or office and to use as charging plates for crystals or just to hold crystals. In distance healings and grids, they are perfect to place crystals on for the Chakras, or to add energy through amplifying those placed on it.