Copal Amber is my go-to stone to protect against intentional or unintentional psychic attacks.  It has a gelatin like action to slow down and stop negative energies which it then absorbs and cleans.  It is a must have piece for every household! 
 
Sizes vary but most are 2.5" long.
 
7 available.  Price is per piece. 
 
Please let us intuitively select a piece for you!