Brookite Luster
Optical Properties of Brookite 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. Brookite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Brookite luster is the quantity of light the crystal reflects when light is incident on it. Brookite which is commonly found in Red, Reddish, Brown, Black, Brown, Reddish, orange color, is Gemmological Tables (2004) More from other references in nature. It possess Adamantine luster.