Lub nplhaib, ib lo lus Suav, pinyin: jiè zhi, yog lub nplhaib me me hnav ntawm tus ntiv tes rau kev ua koob tsheej lossis kev kho kom zoo nkauj, ua los ntawm hlau, jade, thiab lwm yam.
Nplhaib feem ntau hu ua "rings" nyob rau hauv Suav teb thaum ub, thiab cov tsos ntawm lub npe "ntiv nplhaib" yog ib qho teeb meem ntawm Yuan Dynasty.