Other natural products are also being used in place of plastic. They include the pit, or center, of apricot fruits and the shells of nuts. The pits and shells are ground up and are rough enough to be exfoliants. They — along with jojoba beads — have been used for years by cosmetics manufacturers. So has pumice — a lightweight stone formed by volcanic activity. It has long been used in many kinds of exfoliating and cleaning products.
Source: tatoeba (12274026)