The F Stones
Fluorite:  Green, Blue, Violet or Yellow
Magickal Properties:  Mental Powers, Understanding, Objectivity, Advancement of the mind, Concentration, Riases the I.Q. to the highest mental capacity, Helps relieve mental disorders and problems of the nervous system.

Fossil:
Magickal Properties:  Elemental Power, Past-Life Regression, Protection, Longevity.