Spiny oyster shell is the shell of the spondylus, which means "spines on the back." This is a colorful, but very spiny shell. The color ranges from red, orange and purple to white and even yellow. It is found in the Sea of Cortez off Baja California and Mexico. Native American popularized this shell when they started to import it isn 1976 for jewelry.
Spiny Oyster Shell
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