Hydrohalloysite from California, USA
USA | |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Van Nostrand Reinholt Press: 436. |
| Jahns, Richard Henry & Wright, Lauren A. (1951), Gem and lithium-bearing pegmatites of the Pala district, San Diego County, California. California Division of Mines Special Report 7-A: p. 31. |