irregular: 2.3 cm (7/8 in.)
Terracotta
Ceramic
KoreanCeramic
KoreanCeramic
KoreanCeramic
JapaneseCeramic
KoreanTerracotta
GreekBlackened gray earthenware
3rd millennium BCEChineseGray earthenware
3rd millennium BCEChineseInlaid celadon ware: light gray stoneware with celadon glaze over decoration inlaid in black and white slips
13th centuryKorean