Native metallic copper was formerly abundant at the Santa Rita mines,
and there is every probability that the material out of which some of
the aboriginal copper bells were made was found here, and that these
mines were the source of float copper found in Arizona ruins. Although
no copper implements were found by the author in the Mimbres ruins, he
has been told that objects of copper apparently made by the aborigines
have been found in some of the graves.[24]