Iolite

Iolite is a magnesium iron aluminium cyclosilicate. Iron is almost always present and a solid solution exists between Mg-rich cordierite and Fe-rich sekaninaite with a series formula: (Mg,Fe)₂Al₃(Si₅AlO₁₈) to (Fe,Mg)₂Al₃(Si₅AlO₁₈).

Excellent stone for meditation and astral travel.  Helps one grow spiritually in a gentle fashion.  Considered a very strong "Shaman" stone and can stimulate clear psychic visions.