This listing is for 1 single Iolite or Cordierite Pocket Stone.
Cordierite or 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 to (Fe, Mg)₂Al₃.Wikipedia
