There is a Buddhist story...
There is a Buddhist story about a wrestler who wore a precious stone in an ornament on his forehead. During a certain wrestling match, the stone was crushed into the wrestler's forehead and was covered with dirt and blood. When the wrestler touched his forehead, all he felt was the dirt and blood. He thought, sadly, that he had lost the precious gem. But when he went to the doctor, the first thing the doctor did was to thoroughly cleanse the wound, and in doing so, he discovered the gem, pressed into the skull. He held up a mirror, and showed the wrestler the embedded gem.