Long Lost Thunderstone?

Dr. Fong Says:
"A Thunderstone eh? The only other reference I can find to a thunderstone is from Pokemon.. Could this be some ancient form of Poké Ball? I don't know much about Pokemon. If you have any information on this please post in the comments."

"CONCORD, New Hampshire (AP) -- In 1872, so the story goes, workers digging a hole for a fence post near Lake Winnipesaukee in the central part of this New England state found a lump of clay that seemed out of place.

There was something inside -- a dark, odd-looking, egg-shaped stone with a variety of carvings, including a face, teepee, ear of corn and starlike circles.

A letter to the historical society in 1931 suggested it was a "thunderstone," which, the writer said, "always present the appearance of having been machined or hand-worked: frequently they come from deep in the earth, embedded in lumps of clay, or even surrounded by solid rock or coral.""

Original Article