Largest pocket cross-section

Locality: Cahuilla District, Riverside Co., California, USA

Caption: Sketch of a cross section of the largest pocket showing the relative positions of the tourmaline and quartz crystals and the perthite and anhedral quartz matrix. Source: Gochenour, K. 1988. Black Tourmaline from Little Cahuilla Mountain, Riverside County, California. Rocks and Minerals, 63 (6): p. 442.

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