Unknown | obsidian
800 - 1520 CE | copper
1800s | Ivory
300 - 900 CE | clay
800 - 1200 CE | clay
1300 - 1521 CE | clay
300 - 900 CE | jade
1800s | Fossil Ivory
300 BCE - 300 CE | clay
500 - 1000 CE | clay, polychrome
300 BCE - 300 CE | clay, slip, paint
300 BCE - 200 CE | clay, slip, paint
1800s | Ivory, ink
1200 - 1500 CE | clay
1600 - 1800 | clay
early 20th century | earthenware
20th century | clay, pigment