Blue Obsidian TumblestoneChakraThroat, Third EyeZodiacAquariusElementWater Physically: Blue Obsidian may be helpful in the treatment of speech defects, eye disorders, Alzheimer's, schizophrenia and multiple personal disorders.Emotionally: Helps one to view life with a calmness and serenity.Spiritually:Blue Obsidian opens the aura to receive healing energy.Magickally:Purification, manifestation, transformation, astral travel. \n \nBlue Obsidian aids in astral travel, facilitates divination, and enhances telepathy. Blue Obsidian activates the throat chakra and supports communication skills. Every crystal purchased is cleansed before shipping and comes with information on the crystal free of charge  CRYSTAL SIZES:Small = 5mm - 10mmMedium = 10mm - 20mmLarge = 20mm - 30mmX-Large = 30mm - 40mm