| Title | Quartz monzonite, Los Angeles County, California |
| Description | This monzonite contains white plagioclase, pink perthite, glassy clear quartz and black biotite. The specimen is 10 cm across. |
| Location | USA ▹ California ▹ Los Angeles |
| Photographer | Mike Davis. 2001-04-24. |
| Collection | Ward’s Collection of Classic North American Rocks #117. |
| Key words | monzonite, California |
| Tech details | 586 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 382 |
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