R 457 % (brightness)94.6 Ry % (whiteness)95.9 Yi %1.7 Cie l (lightness)98.4 Cie a (blueness)0.01 Cie b (yellowness)0.91 Moisture %0.00 Loi 1000 Sio2 % (silica)61.6 Mgo % (magnesium oxide) 31.3 Al2o3 % (aluminum oxide) 0.42 Cao % (calcium oxide) 0.05 Fe2o3% (iron oxide ) 0.08 Quartz %0.0 Amphibole / serpentineno Maintalc