Red Coral dangle earrings. Set in solid sterling silver. Handcrafted by a Zuni artist. They dangle on silver posts and backs. ZUNI HANDCRAFTED RED CORAL DANGLE EARRINGS Red coral 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.