Handmade Feng Shui Obsidian Pi Yao Pendant Necklace for Wealth Luck (With a Betterdecor Pouch) the sale is for one Obsidian pi yao pendant necklace and a pouch with "Betterdecor" printed on it size of pi yao: 0.75" x 1.25". Material : Obsidian. Obsidian is stone of truth, anti negative energy. adjustable string , Handmade Design ! Pi Yao is also called Pi Xiu /Pi Xie , it always related to wealth . Wearing a Pi Yao amulet jewelry will bring you good finance luck. good for Feng Shui and Gifts