Chalcedony from Santa Clara County, California, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| [var. Myrickite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 318. |
| [var. Agate] Butler, 1995. Rockhounding California, p.135. |
| Rocks & Minerals (1948): 23: 797. Rocks & Minerals (1944): 19: 346-347 |
| Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191. | |
| Eugene Cisneros |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Lone Hill Quarry, Lone Hill, San Jose, Santa Clara County, California, USA