Red coral (Corallium Rubrum) comes from certain areas, such as the Mediterranean, where the specific water temperature and conditions allow coral to thrive. Coral is a hardened tube or branch. Only about 10% of coral is considered jewelry quality. Coral comes in shades from blood-red to orange to pink to white. Although coral has been used by Stone Age peoples as long as 30,000 years ago to decorate sepulchers (burial vaults), Native American artists have only used coral for the last 600 years. Navajo overlay ring set in solid sterling silver. A single red coral stone centers the design.Beautiful carved silver design has elements of feathers, storm clouds and whirl winds. A single piece of 1/2 round wire wraps around the outside and creates a smooth edge. A heavy weight shank is used, giving this ring a substantial feel when worn.