Sun Yin Yang Medallion Amulet Magic Circle Powers Simulated Black Onyx Pendant 18 Inch Necklace Best Amulets Collection. Positive Energy Sun Yin Yang Medallion Amulet Magic Circle Powers Simulated Black Onyx Lucky Charm Pendant on 18 Stainless Steel NecklaceSun Yin Yang Medallion Amulet Magic Circle Powers Simulated Black Onyx Pendant 18 Inch Necklace Medallion Size: 30mm (1 1/4"). Made from Simulated Black Onyx to Show More Perfection and Beauty. Setting is made from Stainless Steel. Ready to Wear with Beautiful 18" Bead Style 2.5mm diameter Stainless Steel Chain Necklace. Comes with Branded Packaging