Black Sardonyx Tumblestone  Every crystal purchased is cleansed before shipping and comes with information on the crystal free of charge  Please Note:The size, shape and colour of the crystal you will receive may differ slightly from the crystal shown in the image. As crystals are from the earth, each is very unique CRYSTAL SIZES:Small = 5mm - 10mmMedium = 10mm - 20mmLarge = 20mm - 30mmX-Large = 30mm - 40mm