資料來源 : pyDict

重晶石

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Cawk \Cawk\ (k[add]k), n. [Prov. E. cauk limestone. A doublet of
   chalk.] (Min.)
   An opaque, compact variety of barite, or heavy spar. [Also
   written {cauk}.]