A Treasure of Free Homemade Gold Prospecting Equipment Plans and Commentary: Ever Heard of an Arrastra?

Blue Bowl Concentrator

Friday, December 14, 2012

Ever Heard of an Arrastra?

This site from Chico,  California goes into what an arrastra was, or is, and has wonderful photos of old ones. Click a link and you can see examples of stamp mills.
Arrastras were brought from Spain to the new world. The Mexicans made some changes, but basically it was a device with stone wheels that turned inside a flat stone surface for grinding quartz. As you know, gold is found inside quartz veins and the arrastras were made to crush the quartz so the gold could be separated. They were usually powered by horses or burros. I have seen one model that men used to push. Wow!
http://www.csuchico.edu/~rcooke/rastra.html
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