irregular: 2.4 cm (15/16 in.)
Ceramic
KoreanTerracotta
RomanTerracotta
Ceramic
EgyptianTerracotta
Terracotta
GreekCeramic
17th centuryJapaneseCeramic
KoreanTerracotta
GreekLow-fired blackened gray and buff earthenware
3rd millennium BCEChinese