can calm you when place in the hand opposite to your dominate hand. ... can ease stress. ....once placed in alcohol by the Greeks to stop drunkenness. .....loses its color if the drink is poisoned. .....used to protect against thieves....harm...danger and sickness. Helps open and active the crown chakra......can be used with pyrite, celestite, kynite and tigers eye to enhance dreams and open communication. ..helps with lucid dreams