Indicolite from selected localities.
USA | |
| Swoboda, E. R. 2001. Pala district 1947-48: Unpublished field notes and personal interviews. Swoboda Inc., Beverly Hills, Los Angeles County, CA; 5/2; 8 p. |
Kunz, G.F. (1905) Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau Bulletin 37: 124-125. | |
Sheppard, J. B. (2008), History of the surface prospects and underground mining developments made along the northern portion of the Stewart pegmatite; personal communication with Scott L. Ritchie, San Diego Mining Company (SDMC). June/July. |
Stewart Mine, Tourmaline Queen Mountain, Pala, Pala Mining District, San Diego County, California, USA