Luster refers to the way light interacts with the surface of a mineral, giving it a certain shine or glow. It describes the appearance of a material’s surface when illuminated, and it can vary widely among different substances.
In the mineral world, luster is classified into several categories, such as metallic, glassy, pearly, silky, dull, and resinous. For instance, a metallic luster indicates a shiny, mirror-like surface, while a dull luster appears more matte and lacks shine.
This property is significant in geology and gemology because it helps identify minerals and gemstones. Understanding luster can also enhance our appreciation for art and jewelry, as it contributes to the overall aesthetics of a piece.