It is brittle with a subconchoidal fracture and it is quite soft, with hardness 3.5 to 4, between calcite and fluorite. Specific gravity is 3.12, denser than both dolomite and calcite. It is soluble in acids, as are all carbonates.
Brittle, subconchoidal fracture, soft, hardness 3.5 to 4, between calcite and fluorite, specific gravity 3.12, denser than dolomite and calcite, soluble in acids, all carbonates are soluble in acids.