* Hurlbut, Cornelius S.; Klein, Cornelis, 1985, "Manual of Mineralogy", 20th ed., John Wiley and Sons, New York ISBN 0-471-80580-7* Sinkankas, John, 1994, "Emerald & Other Beryls", Geoscience Press, ISBN 0-8019-7114-4* Minerals.net
==See also==* Chrysoberyl* List of minerals==References==* Hurlbut, Cornelius S.; Klein, Cornelis, 1985, "Manual of Mineralogy", 20th ed., John Wiley and Sons, New York ISBN 0-471-80580-7* Sinkankas, John, 1994, "Emerald & Other Beryls", Geoscience Press, ISBN 0-8019-7114-4==External links==