鼎鐺玉石 [－铛－－]

Jyutping ding2 caang1 juk6 sek6
Pinyin dǐng chēng yù shí

Definitions (CC-CEDICT)
  1. lit. to use a sacred tripod as cooking pot and jade as ordinary stone (idiom); fig. a waste of precious material
  2. casting pearls before swine