Good Vintage USA made turquoise shell bowl

This is a good very nice, shallow vintage bowl shaped like a shell. It is marked with "USA" on the bottom.

The bowl measures 11 by 8.5 inches and stands 2.25 inches high.

The bowl is in good vintage condition. There is a spot of something silver that looks like it is part of the glaze and there is a faint line where there was dirt in the bowl at some point.

If you look closely, there is some crazing in the bowl.