Pili i ka ferrous metala, non-ferrous metala, IC pepa, uhi, lamellar metala;ʻO ke aniani, ka seramika, ka agate, ka pōhaku, ka pepa plastik, a pēlā aku;ʻO ka hoʻāʻo ʻana i ka paʻakikī, e like me ka hoʻāʻo ʻana i ka hohonu a me ka gradient o ka carbonization a me nā papa paʻakikī.
