late 19th century - early 20th century | gelatin silver process
October 8, 1930 | gelatin silver process
300 BCE - 300 CE | clay, slip, paint
500 BCE - 700 CE | jade
1800s | Ivory
100 BCE - 700 CE | obsidian
300 - 900 CE | clay
1300 - 1521 CE | clay
300 - 900 CE | jade
Unknown | jade
late 19th-early 20th century | clay
circa 1795 | marble
300 BCE - 300 CE | clay
100 BCE - 700 CE | clay