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USA | |
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| [var. Iceland Spar] Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
Murdoch, J., Webb, R.W. (1966) Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 118.
Weber, F. Harold Jr. (1963) Geology and mineral resources of San Diego County, California. County Report 3. California Division of Mines and Geology
Wright, L.A. (1957) Calcite (optical grade) California Division of Mines and Geology Bulletin 176: 99-100. |
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| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 82. |
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| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
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| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Mesa Grande Mining District
| Fisher, Jesse (2002) Gem and Rare-Element Pegmatites of Southern California. The Mineralogical Record, 33 (5) 363-407 |
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| Rob Lavinsky |
Himalaya Mine, Gem Hill, Mesa Grande Mining District, San Diego County, California, USA