Pi Yao (Pi Xiu) This is a powerful talisman to bring riches into the home or workplace. It has a voracious appetite that seems to have no end; this makes him a symbol of good fortune and prosperity. The display of a Pi Yao (Pi Xiu) statue in business is considered a good luck feng to attract a never-ending flow of money. Black Obsidian is a very historical gemstone that has been used as a good luck charm from ancient times. Black Obsidian can return negative energy to the earth because it has very strong connection with the earth. This is the reason why it is a great gemstone for protection from evil. It is also a very powerful and creative stone. It increases self-control. It forces facing up to one’s true self. Releases imbalances and negative energies. Black Obsidian is protective and provides support during change.