This is a #2 quality purple spiny oyster shell.
This shell has about 1/4" to 1/2" coloring around the shell. The depth is about 3/4" The crust side has some holes and some chipping around the edge.
This species is not endangered. The shells are a by-product of the food industry and come from sustainable fisheries.
A U.S. Fish & Wildlife export permit is required for all exports outside of the U.S.