Optical Properties of Apatite 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. Apatite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Apatite luster is the quantity of light the crystal reflects when light is incident on it. Apatite which is commonly found in Yellow, Green, Blue, Blue, Green, White, Yellow, Green, Red, Blue, Green, Colorless, Yellow, Blue, Violet, pink, Brown color, is Gemmological Tables (2004) More from other references in nature. It possess Vitreous luster.