A crystal which looks like it holds rainbows inside when viewed in bright light. Caused by light being refracted by the prismatic effect of a crack or inclusion. The refraction is often temperature sensitive causing the rainbow to appear and disappear. It is believed that these crystals exhibit the closest manifestation of pure white light that can be witnessed on the physical plane. Rainbow crystals are used during meditation to escort us into the realm of the pure white light and can bring depth and clarity to dreams, help manifest wishes, and overcome negativity to be able to love life in the present moment.