EVERYDAY SCIENCE

Detailed explanation-1: -In textiles, lustre or luster is a physical property that makes them appear bright, glossy, and shiny. The amount of light reflected from the surface of a fiber is referred to as its luster.

Detailed explanation-2: -Minerals that are opaque and shiny, like pyrite, are said to have a “metallic” luster.

Detailed explanation-3: -Luster describes how the mineral reflects light. Metallic luster looks like a shiny metal such as chrome, steel, silver, or gold. Metallic minerals are also always opaque. Non-metallic minerals may be shiny and reflect light, however, they do not look like a metal.

Detailed explanation-4: -Luster describes the way a mineral reflects light. Measuring it is the first step in mineral identification. Always check for luster on a fresh surface; you may need to chip off a small portion to expose a clean sample. Luster ranges from metallic (highly reflective and opaque) to dull (nonreflective and opaque.)