Heavy spar

1.

(Min.) Native barium sulphate or barite, - so called because of its high specific gravity as compared with other non-metallic minerals.

Noun

1.

heavy spar - a white or colorless mineral (BaSO4); the main source of barium Synonyms: barite, barytes, barium sulphate

atomic number 56, Ba, barite, barium, barium sulphate, barytes, mineral