自然铜 zì rán tóng

DEFINITIONS

  1. natural copper
  2. chalcopyrite
  3. copper iron sulfide CuFeS2

CHARACTERS

自 zì
HSK 3
self, private, personal; from
然 rán
HSK 2
yes, certainly; pledge, promise
铜 tóng
HSK 6
copper, brass, bronze