Chakras: All, especially Root 
Benefits: Aids in healing emotional issues caused by lost soul parts.
Balances the meridian system.
Promotes energy flow.
Supports awakening of interdimensional consciousness.
Can clear blocked energies in any chakra.
It's both grounding and energizing. 
Can take one back to past lives and forward to probable futures.
Teaches one to experience interdimensional consciousness without losing one's connection to Earth. 
Helps with soul retrieval. 
 
Each crystal varies and may not be the exact one you see in the photo.