heavy spar

Also found in: Dictionary, Thesaurus, Wikipedia.
Related to heavy spar: barytes, barite

heavy spar:

see baritebarite
, barytes
[New Lat., from barium], or heavy spar,
a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular or massive form and has a high specific gravity.
..... Click the link for more information.
Mentioned in ?