Luster is the surface appearance of a substance, or the manner in which it reflects light. The luster of minerals varies with the nature of their surfaces. A variation in the quantity of light reflected produces different degrees of intensity of luster; a variation in the nature of the reflecting surface produces different kinds of luster.
Kinds of Luster - The kinds of luster recognized are as follows:
Degrees of Luster - The degrees of intensity of luster are classified as follows:
- Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf: New York (1987)
- Dana, Edward S. and Ford, William E. Dana's Textbook of Mineralogy - Fourth Edition, John Wiley and Sons: New York (1932)
- What is Luster?, Amethyst Galleries.