Mica Group from selected localities.
USA | |
| Bernstein, D. 1996. Personal Communication with Scott L. Ritchie; Mineral Specimen Study (1990 Crown Jewel mine discovery description), Jan. |
| Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25. |
Kunz, G. F. 1905. Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau bulletin 37: p. 121-22. | |
Laurano, A. F., Jr. (1991) Rainbow mine (Juan Diego) case files, 1988 thru 1991: unpublished. | |
San Diego Mining Company (1998), Sly Rick lode field analysis and valuable mineral discovery, Jan. | |
| Kunz, G. F. 1905. Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau Bulletin 37: p. 21, 122-123, 171 p. |
| Rynerson, F. J. 1967. Exploring and Mining Gems & Gold in the West; Ch. 17, p. 118-120: Naturegraph Publishers, Inc., Happy Camp, California. |