The Nadeau-Magnolia Mine is a historic mining site located in the unincorporated community of Onyx, in Kern County, California. This mining site is part of the historic mining operations that were prevalent in the Kern River Valley and the southern Sierra Nevada region.
Onyx is a small unincorporated community located in Kern County, California, in the southern Sierra Nevada mountain range in Kern County, which is known for its diverse geography, including mountains, valleys, and desert regions. The population was 475 at the 2010 census, down from 476 at the 2000 census.