Precious Stones & Gems

19th century

early 19th century

19th century

19th century (Ch'ing)

early 19th century

ca. 1854

2nd half 19th century

ca. 1862

1870

1874

late 19th century

late 19th-20th century (modern)

late 19th century

late 19th-early 20th century (modern)

1877

before 1896

ca. 1900

ca. 1900

ca. 1900

20th century

1900

early 20th century (modern)

1908-1914

1911