San Jose in Santa Clara County, California — The American West (Pacific Coastal)
The exact use of this concentrator from the Guadalupe mine is not known. Concentrators were sometimes used to separate free mercury from the dust captured in the cyclone collector at the output of the rotary furnace or heavy cinnabar from the dust of crushed rock. Old dump rock discarded by miners in the 1800’s was, in their opinion, low-grade ore. In the 1900’s the low-grade rock was considered valuable. The crushing of old dump rock and the concentration of fine rock was often tried, but with mixed results. After 1942, hand sorting and roasting the old rock in rotary furnaces proved to be more economical.
Erected 2011 by The California State Society, Daughters of the American Revolution and New Almaden Quicksilver County Park Association.
Marker series. Daughters of the American Revolution marker series.
Location. 37° 10.403′ N, 121° 49.575′ W. Marker is in San Jose, California, in Santa Clara County. Marker can be reached from Almaden Road. Touch for map. The Hacienda Mining Display is a short walk on the Deep Gulch Trail from the Almaden Quicksilver County Park parking lot. Marker is at or near this postal address: 21731 Almaden Road, San Jose CA 95120, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. D Retort and Condensing System (here, next to this marker); Mercury Storage Vault (here, next to this marker); Hoeing Table and Cleaning Tank (here, next to this marker); Gould Rotary Furnace and Condensing System (here, next to this marker); Cornish Pump (here, next to this marker); Skip Loader (a few steps from this marker); Hacienda Mining Display (a few steps from this marker); Mine Air Compressors (a few steps from this marker). Touch for a list and map of all markers in San Jose.
Categories. • Industry & Commerce • Natural Resources •
Credits. This page was last revised on June 16, 2016. This page originally submitted on November 26, 2011, by Barry Swackhamer of San Jose, California. This page has been viewed 349 times since then. Photos: 1, 2, 3, 4. submitted on November 26, 2011, by Barry Swackhamer of San Jose, California. • Syd Whittle was the editor who published this page.