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USA | |
| [var. Chalcedony] Mitchell, J.R. (1995) Gem Trails of Northern California. |
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 317. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 74, 134 Boalich, E. S. (1921), Mendocino, Monterey, Mono, Napa, Solano, Stanislaus Counties: California Mining Bureau. Report 17: 157 Van Nostrand Reinholt Press: 80 |
| Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966) - California Division Mines and Geology, Bulletin 189. p.1-559. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| [var. Chalcedony] Mineralogical Record (2002) 33:237-242 Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 318 Kunz, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureau |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Dunning, G. E., Walstrom, R. E., & Lechner, W. (2018) Barium Silicate Mineralogy of the Western Margin, North American Continent, Part Geology, Origin, Paragenesis and Mineral Distribution from Baja California Norte, Mexico, Western Canada and Alaska, USA. Baymin Journal, Vol. 19, No. 5 Dunning, G.E. and Cooper, J.F. (1986): Mineralogy of the Kalkar Quarry, Santa Cruz, California. Mineralogical Record, 17(5), 315-326. Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Gross, E.B., Chesterman, C.W., Dunning, G.E., and Cooper, J.F. (1967) Mineralogy of the Kalkar quarry, Santa Cruz, California. California Division Mines and Geol. Special Report 92: 3-10 Gross, E.B., Wainwright, J.E.N., and Evans, B.W. (1965) Pabstite, the tin analogue of benitoite. American Mineralogist: 50: 1164-1169 Van Nostrand Reinholt Press: 350 |
Agate Beach, Bolinas, Marin County, California, USA