Correspondence, reports, and maps of the New Pedrara Mexican Onyx Company, an American firm which mined onyx marble in Baja
California, Mexico from 1893-1958.
The New Pedrara Onyx Company of New York and Chicago began prospecting for onyx marble in northern Baja California in 1892.
Onyx marble, also known as banded calcite or Mexican onyx, is used in building construction and decorative arts. Company president
Samuel Franklin Emmons (1841-1911) dispatched George Foster and William Denton (1828-1907) to survey mineral deposits in Baja
California. After exploring the Punta Final region, they discovered the El Mármol site with rich deposits of onyx marble.
.25 Linear feet
(1 archives box, 1 map case folder)
Digital copies of this material are intended to support research, teaching, and private study. This work may be used without
prior permission. The original manuscripts for this collection are held by Special Collections & Archives, UC San Diego Library.