Amulet Yin Yang Black Agate White Quartz Gemstones Positive Lucky Charm Bracelet Best Amulets Collection. Amulet Yin Yang Balance Powers Black Agate and White Quartz Gemstones Positive Lucky Charm Energies Adjustable BraceletAmulet Yin Yang Black Agate White Quartz Gemstones Positive Lucky Charm Bracelet Yin Yang symbol is made from Black Obsidian and White Quartz Gemstones. Gemstone Beads size is 10mm. Made with Natural Black Agate and White Quartz Gemstone Beads. Bracelet Size: Comes with Adjustable Black satin cord. Bracelet will fit wrists up to 7.5 inches. Comes with Branded Packaging and Information Card representing Metaphysical Properties of Gemstone.