Optical Properties of Kyanite 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. Kyanite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Kyanite luster is the quantity of light the crystal reflects when light is incident on it. Kyanite which is commonly found in Blue, Yellow, Colorless, White, gray, Green, Black color, It possess Pearly and Vitreous luster.