Fossil coral gives.protection, grounding, and transformation. It's also believed to have healing properties and can be used to promote emotional balance. 
Protection , this stone known to have magical talisman energy from the Cretaceous Era,  it is approx 146 million years old.
Fossil coral is cosidered a protective stone that guards against negative energies. 
It's believed to be a good protection stone for travel on or near water.