xi3
ruler's seal

strokes 19
radical
strokes after radical 14
碧玺 碧璽 bi4 xi3
tourmaline

国玺 國璽 guo2 xi3
seal of state

红璧玺 紅璧璽 hong2 bi4 xi3
topaz

玺印 璽印 xi3 yin4
seal (esp. of ruler)

印玺 印璽 yin4 xi3
official seal; imperial or royal seal; papal bull

掌玺大臣 掌璽大臣 zhang3 xi3 da4 chen2
chancellor (rank in various European states); grand chancellor

掌玺官 掌璽官 zhang3 xi3 guan1
chancellor (rank in various European states)