Yin Yang Best Friends or Love Couples Lucky Coin Donuts Agate White Simulated Cats Eye Amulet Necklaces Best Amulets Collection. Yin Yang Energy Best Friends or Love Couples Lucky Coin Donuts Charms Black Agate White Cats Eye Amulet NecklacesYin Yang Energy Best Friends or Love Couples Lucky Coin Donuts Agate White Simulated Cats Eye Amulet Necklaces Set of Two Cute and Attractive Lucky Charms Coin Shape Donut Crystals. Size: Each Donut is 30mm. Double Lucky Yin Yang Set Amulets. Ready to wear with Cotton Waxed Adjustable Cord which adjusts from 16 up to 24 inches long. Comes with Cute Gift Style Packaging.