TTO 200 Bohemian Crystal Necklace Bohemian (or Czech) crystal necklace with graduated faceted leaded glass beads separated by gilt metal rondels and beads on a silver chain, circa 1910. Total length is 17 ½ inches. A stunning piece. Bohemia crystal is a decorative glass produced in regions of Bohemia and Silesia, now in the current state of the Czech Republic, since the 13th century.