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