1 : a glow of reflected light : sheen specifically : the appearance of the surface of a mineral dependent upon its reflecting qualities the luster of polished metal.

What is the definition of luster in science?

lustre, in mineralogy, the appearance of a mineral surface in terms of its light-reflective qualities. Lustre depends upon a mineral's refractive power, diaphaneity (degree of transparency), and structure.

Does lustre mean shiny?

The definition of luster is a brightness, shine or special quality, or great fame or honor. When brass is very shiny, this is an example of a time when brass has a special luster.