This high vibrational stone assists in opening up the crown and higher chakras for communication with guides and Higher Self. It is excellent for supporting psychic, divination and 'spirit' work. Use it to help you with psychic ability, awakening gifts and accessing the "Clairs".
The colours vary widely as many crystals come together to form this stone, although typically Tiffany Stone is purple/grey and those pieces are ones that would suit psychic/third eye/crown activation and cleansing.
The redder versions are excellent for power, passion and motivation, and for sexual healing and Kundalini work.
Tiffany Stone is also helpful in expression and working to release from the throat chakra.