Little Joe Mine
The Little Joe and Hoss Opal Mines are located in the Calico Hills and discovered by Ray Duffield in the 1960's[1]. The Royal Rainbow Opal Mine is located a few km to the north.
References
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- ↑ Stephen B. Castor, Gregory C. Ferdock, "Minerals of Nevada," Issue 31, p. 76, 2004.