The ear-bones (otoliths) of freshwater drumfish or lake sheephead which are quite large and resemble porcelain in their peculiar whiteness, and have a semblance of the letter "L" seemingly cut on them. From this circumstance they are known as "lucky stones."
Small smooth white pebbles of quartz found in abundance in Ohio and probably elsewhere around the Great Lakes, Lake Erie in particular, worn smooth by the action of the water. Beloved of children. Of course powerful talismans of good luck.