Another case, published in 1831 by the American Journal of Science, deals with a block of marble extracted from a depth of about 60 feet, which was later cut into pieces. The marble, believed to have formed millions of years ago, revealed precise cuts 2 inches by 0.5 inch—the shapes of the very similar modern letters "u" and "i." The regularity of the symbols gave the impression of having been engraved by human hands.

A similar case was brought to light in 2002 in China's Guizhou Province, where a broken rock was found to have, at first glance, perfect Chinese characters of inexplicable origin, considering that the rock dated back to 200 million years ago! This relic is known as "The Stone of Hidden Words."