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USA | |
| Mineral Specimen Study (1990 Crown Jewel mine discovery description), Jan. Bernstein, D. 1996. Personal Communication with Scott L. Ritchie |
| Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC 07/25. |
| Kunz, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureau |
| 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 (1991) Rainbow mine (Juan Diego) case files, 1988 thru 1991: unpublished.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, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureau |
| Rynerson, F. J. 1967. Exploring and Mining Gems & Gold in the West Ch. 17, p. 118-120: Naturegraph Publishers, Inc., Happy Camp, California. |