Enstatite from
USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 214 Gilluly, J. (1937), Geology and ore deposits of the Ajo quadrangle, AZ, AZ Bur. of Mines Bull. 141. |
| Michael Cline Collection |
| Data provided by Janet Clifford, Cleveland Micromineral Symposium |
Phelps Dodge Corporation Well No. 1, Little Ajo Mountains, Ajo Mining District, Pima County, Arizona, USA