Add a rare, 100% authentic piece of marine history to your collection with this premium Double Spiny Oyster Shell Pair (Spondylus princeps ). Also known as the thorny oyster, this large 7.5" x 5.5" specimen features bold coastal texture and rich archaeological significance. Sourced sustainably from the Pacific Coast of Mexico, these real ocean-harvested shells are perfect for collectors, high-end coastal home decor.