Barite

n. mineral

Barite (BaSO4) is a mineral consisting of barium sulfate. It is generally white or colorless, and is the main source of barium. Baryte is the British spelling, and the mineral is also called heavy spar. The radiating form, sometimes referred to as Bologna Stone, attained some notoriety among alchemists for the phosphorescent specimens found in the 1600s near Bologna, Italy by one Mr. Vincenzo Cascariolo. Its Mohs hardness is 3, the refractive index is 1.63 and it has a specific gravity of 4.3-5. Its crystal structure is orthorhombic.
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Noun
1. a white or colorless mineral (BaSO4); the main source of barium
(synonym) heavy spar, barytes, barium sulphate
(hypernym) mineral
(substance-meronym) barium, Ba, atomic number 56

n. barite, mineral

n. hepatite