Coin silver
19th centuryAmericanTerracotta
5th century BCEGreekBrown-glazed ware: light gray stoneware with lustrous dark-brown glaze; with recently associated pewter cover
ChineseStone: greenish color with lighter inclusions
3rd-4th century CEGandharanLight gray stoneware with localized areas of kiln-darkened surface
7th centuryKoreanTerracotta
5th century BCEGreekMetal
20th centuryGermanPunch'ŏng ware: light gray stoneware with pale celadon glaze over stamped decoration inlaid with white slip
15th centuryKoreanSalt glaze ceramic.
16th centuryGermanCeramic
20th centuryGermanPerhaps Jizhou-type ware: light gray stoneware with dark brown glaze and decoration created through the application of ash onto the surface of the glaze
12th-13th centuryChinese