Black Amethyst increases psychic powers and provides protection against malevolent spirits encountered during astral travel or those who seek to manipulate or possess you in mediumship. It casts a boundary around the aura so that mediums, clairvoyants, healers, and empaths will not be drained by the pain and sorrow of others. It is mainly found in Uruguay and Brazil as clusters.  Can have visible red hematite inclusions; a stone combining the will to win with common sense and limits.
 
Heights range from 3 3/4" to 4 1/4"