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