The Coso Artifact

On February 13, 1961, Wallace Lane, Virginia Maxey, and Mike Mikesell were seeking interesting mineral specimens, particularly geodes, for their "LM & V Rockhounds Gem and Gift Shop" in Olancha, California. On this particular day, the trio were about six miles northeast of Olancha, near the top of a peak about 4,300 feet in elevation and about 340 feet above the dry bed of Owens Lake. According to Maxey, "We hiked about three miles north, after we had parked some five miles east of State Highway 395, south of Olancha, California." At lunchtime, after collecting rocks most of the morning, all three placed their specimens in the rock sack Mikesell was carrying.
The next day in the gift shop's workroom, Mikesell ruined a nearly new diamond saw blade while cutting what he thought was a geode. Inside the nodule that was cut, Mikesell did not find a cavity as so many geodes have, but a perfectly circular section of very hard, white material that appeared to be porcelain. In the center of the porcelain cylinder, was a 2-millimeter shaft of bright metal. The metal shaft responded to a magnet.

There were still other odd qualities about the specimen. The outer layer of the specimen was encrusted with fossil shells and their fragments. In addition to shells, the discoverers noticed two nonmagnetic metallic metal objects in the crust, resembling a nail and a washer. Stranger still, the inner layer was hexagonal and seemed to form a casing around the hard porcelain cylinder. Within the inner layer, a layer of decomposing copper surrounded the porcelain cylinder.