Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1995). "Topaz"(PDF). Handbook of Mineralogy. Vol.II (Silica, Silicates). Chantilly, VA, US: Mineralogical Society of America. ISBN978-0-9622097-1-0. Retrieved December 5, 2011.