Optical Properties of Cordierite are its behavioral responses towards light. While few optical properties can be identified with naked eyes, other require special instruments by the gemologists to identify them. Cordierite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Cordierite luster is the quantity of light the crystal reflects when light is incident on it. Cordierite which is commonly found in Blue, Violet, Greenish, Brown, Colorless, Colorless, Blue, Violet, Yellow, gray color, It possess Greasy and Vitreous luster.