Shattuckite protects you from entity attachments.  This would be great if you are on a ghost hunt or have spiritual activity in your home.  It is also a stone of intuition, and mediumship.  It helps make a mind (clarity), heart, and throat connection for speaking from the heart.
 
Left - 1.25" x .75" x  .14"
Middle - SOLD
Right - SOLD
 
Price is per Cabachon.