Strictly speaking, it is divided into the ore, from which the flakes are peeled off, and the residues, which are not used and are thrown away after a series of flake-exfoliation processes.
厳密には、剥片を剥離している状態の原石（石材）と、一連の剥片剥離の工程が終わって用済みとなり廃棄される残滓とに分けられる。