That elestial crystal has an iron inclusion which makes it master healer. This enhances the capabilities of the crystal to chanel a wide spectrum of energies. A Rainbow crystal contains inclusions or internal fractures that show a rainbow when viewed from an angle. These crystals bring rainbow into ones life and are a very special gift from the spirit keeper of the crystal! They help one to deal with sorrow and negativity. They produce the full spectrum of colour, the white light of healing and perfection being dispersed into the individual rays of rainbow. Rainbow crystals are crystals of joy, optimism, and understanding.