Min. [see CALC-.] Calcareous spar or rhombohedral crystallized carbonate of lime.
1822. Mrs. Lowry, Convers. Min., II. 28. Most of the fine calcspar of Derbyshire is of a deep topaz yellow colour.
1850. Daubeny, Atom. The., viii. (ed. 2), 267. Why for example do the particles of carbonate of lime, assume sometimes the form of calc-spar, sometimes of arragonite, without any change in its relations to other bodies?
