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.
The material is brittle, has a subconchoidal fracture, is soft with a hardness of 3.5 to 4, falls between calcite and fluorite, has a specific gravity of 3.12, denser than dolomite and calcite, and dissolves in acids.