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USA | |
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| Amir Akhavan Collection |
- East Mayacmas Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Rytuba, J.J., Hothem, R.L., May, J.T., Kim, C.S., Lawler, D., Goldstein, D., and Brussee, B.E. (2008): USGS Open-File Report 08-1382 |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| [var. Clear Lake Diamond] Amir Akhavan Collection |
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| [var. Amethyst] Symons, Henry Heilbronner (1940), Quartz gem stones of California: Rocks & Minerals: 15: 41.
Averill, Charles V. (1929), Redding field division, Lassen and Modoc, Napa, Lake, Glenn, Mendocino Counties: California Journal of Mines and Geology, California Division Mines (Report 25): 25: 342 |
- Great Western-Mirabel group
| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census. |
- Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District)
| [var. Chalcedony] Rocks & Min.: 22:615-616. |
- Clear Lake Highlands area
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 314.
Anderson, Charles A. (1936), Volcanic history of the Clear Lake area, California: Geological Society of America Bulletin: 47: 635
Hanks, Henry Garber (1886), Sixth report of the State Mineralogist: California Mining Bureau. Report 6 part 1, 145 pp.: 125 |
Perini Hill, Howard Springs, East Mayacmas Mining District, Lake County, California, USA