Spiny Oyster Shell Sterling Silver Necklace & Earring Set.  (Navajo made) Spiny Oyster Shell can come in a variety of colors and even in raw form.  These polished stones are orange with red veins to make a unique necklace and earring set.  It is Navajo made with a bear signature (Artisan name unknown). So if your looking for a truly unique sterling silver Native American Navajo made piece of jewelry, then you found it. Not for wholesale.