Ancient people have been described as being very superstitious people. How widespread that superstition was is unknown. If the modern world is any example, it can be held that some ancient people believed the legends and superstitions about the adder stone while many did not.
This lack of belief did not stop writers from including the adder stone in the many myths and legends found in Celtic, Welsh, Irish and even Russian countries. (CLICK HERE TO READ THE FULL ARTICLE)