Realgar Luster
Optical Properties of Realgar 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. Realgar optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Realgar luster is the quantity of light the crystal reflects when light is incident on it. Realgar which is commonly found in Red, Yellow, orange color, is Gems in nature.