Gems

Gregory, H.E., 1917, Geology of the Navajo Country; a reconnaissance of parts of Arizona, New Mexico, and Utah: U.S. Geological Survey Professional Paper 93, 161 p., 2 sheets, scale 1:500,000.

Greenspoon, G.N., and Schroeder, H.J., 1973, The mineral industry of Arizona: U.S. Bureau of Mines Minerals Yearbook, 1973, v. 2, p. 69-87.

Gray, Floyd, Miller, R.J., Pitkin, J.A., Bagby, W.C., Hassemer, J.R., McCarthy, J.H., Hanna, W.F., Conant-Callas, M.L., and Lane, M.E., 1989, Mineral resources of the Arrastra Mountain/Peoples Canyon Wilderness Study Area, La Paz, Mohave, and Yavapai Counties, Arizona, Chapter E, in Mineral resources of Wilderness Study Areas - Western Arizona and part of San Bernardino County, California: U.S. Geological Survey Bulletin 1701-E, p. E1-E28, 1 sheet, scale 1:62,500.

Funnell, J.E., and Wolfe, E.J., 1964, Compendium on nonmetallic minerals of Arizona: San Antonio, Tex., Southwest Research Institute, 374 p. [prepared for Arizona Public Service Company, Phoenix, Ariz.].

Everett, F.D., 1974, The mineral industry of Arizona: U.S. Bureau of Mines Minerals Yearbook, 1974, v. 2, p. 73-92.

Elevatorski, E.A., 1978, Arizona industrial minerals: Arizona Department of Mineral Resources Mineral Report no. 2, MR-2, 70 p.

Eckert, A.W., 1987, Earth treasures. Volume 4. The southwestern quadrant; Arizona, Arkansas, California, Colorado, Louisiana, Nevada, New Mexico, Oklahoma, Texas, and Utah: New York, Harper and Row, 740 p.

Dunn, P.J., 1974, Chromian spinel inclusions in American peridots: Deutsche Gemmol. Gesellschaft, Zeitschrift, v. 23, p. 304-307.

Culin, F.L., Jr., 1917, Gems and precious stones of Arizona: Arizona Bureau of Mines Bulletin no. 48, 7 p.

Crawford, W.P., and Johnson, F., 1937, Turquoise deposits of Courtland, Arizona: Economic Geology, v. 32, no. 4, p. 511-523.