Romans loved to wear pearls and once Cleopatra, the Queen of Egypt, drank a pearl at a Roman banquet. She dropped a pearl worth 10 million Roman dollars into a glass of vinegar. The vinegar dissolved the pearl and then she drank it.
We tried the experiment with an eggshell. We put the eggshell in vinegar last Wednesday.
Today, 5 days later, most of the egg shell was gone.