baryte
noun[Gr. heavy; weight.]
Ponderous earth; so called from its great weight, it being the heaviest of the earths. Spec. grav. about 4. Recent discoveries have shown that baryte is an oxyd, the basis of which is a metallic substance called barium. It is generally found in combination with the sulphuric and carbonic acids, forming the sulphate and carbonate of baryte, the former of which is called heavy spar.