The Gem Deposits of Southern California
- Creators
- Jahns, Richard H.
Abstract
On a warm June day nearly 76 years ago, Henry Hamilton was picking his way along the brushy southeastern slope of Thomas Mountain in the Coahuila district of, southern California's Riverside County. As he crossed a small gullied area, he noticed several rough mineral fragments of attractive pink and green color. Carefully tracing the occurrence of this loose "float" material to its source higher on the hill, he encountered a ledge of light gray rock in which a few irregular cavities were lined with crystals of quartz and other minerals. Among these others were beautifully transparent pencil-like crystals of red, pink, green, and blue color. These constituted the first California discovery of gem tourmaline, a material that already had been mined in eastern parts of the United States.
Additional Information
© 1948 California Institute of Technology.Attached Files
Published - Jahns_1948p6.pdf
Files
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Additional details
- Eprint ID
- 113280
- Resolver ID
- CaltechAUTHORS:20220204-174320005
- Created
-
2022-02-04Created from EPrint's datestamp field
- Updated
-
2022-02-04Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Division of Geological Sciences
- Other Numbering System Identifier
- 436