Yin Yang Energy Best Friends or Love Couple Lucky Crystal Point Black Agate White Quartz Amulet Necklaces Best Amulets Collection. Yin Yang Energy Best Friends or Love Couples Lucky Crystal Points Charms Black Agate White Quartz Amulet NecklacesYin Yang Energy Best Friends or Love Couple Lucky Crystal Point Black Agate White Quartz Amulet Necklaces Set of Two Cute and Attractive Lucky Crystal Points Necklaces. Size: Each About 35 X 10mm (+/-), Approximately 1  inches long. 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.