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