Trade involved mainly cowrie shells and coir fiber. Early currency in Brunei included cowrie shells. Kalasha women usually wear long black robes, often embroidered with cowrie shells. Djembes may also be decorated with cowrie shells, coloured paint, decorative tacks, or other metalwork. The women of Tuvalu use cowrie and other shells in traditional handicrafts. The Ghanaian unit of currency known as the Ghanaian cedi was named after cowrie shells. Some tourist sets use cowrie shells. Taxes on slaves were mostly paid in cowrie shells. Less sophisticated pieces might use bone, mother-of-pearl or cowrie shells. The cowrie was the shell most widely used worldwide as shell money. The eyes are created using cowrie shells with a bitumen pupil and dioptase highlighting. A cowrie shell indicates contact with the Red Sea or the Persian Gulf. There, the Nation found a "turtle-shaped island" marked by "miigis" (cowrie) shells. Each player takes a turn to roll the cowrie shells. Six cowrie shells are used to determine the amount to move the players' pieces.