Schaller, W.T., Stevens, R.E., and Jahns, R.H., 1962, An unusual beryl from Arizona: American Mineralogist, v. 47, nos. 5/6, p. 672-699.
Schaller, W.T., Stevens, R.E., and Jahns, R.H.
American Mineralogist, v. 47, nos. 5/6, p. 672-699.
Mineralogy, Silicate, Pegmatite, Gems, Locale,