Prehnite with a dash of purple angelite. 
To encourage lucid dreams. For the return of lost dreams. 
Prehnite is considered the stone of prophecy. 
Angelite is a high vibrational stone that assists in spiritual communication with your spirit guides, ancestors, and more. 
This will help expand your consciousness. 
This is great for mediums, astral projectors, and more. 
Not for beginners.