.925 Sterling Silver Stone: Ammolite Handcrafted and artisan made All pieces are stamped or hallmarked for authenticity Taking you back to prehistoric times! You will find yourself diving into the ocean around 66 million years ago! This beautiful opalized fossil is the outer shell of an ammonite, closely related to octopuses, squides, cuttlefishes, and nautiluses. It doesn't get anymore "Younique" than this!