'Calcareous spar' definitions:

Definition of 'Calcareous spar'

From: GCIDE
  • Calcareous \Cal*ca"re*ous\, a. [L. calcarius pertaining to lime. See Calx.] Partaking of the nature of calcite or calcium carbonate; consisting of, or containing, calcium carbonate or carbonate of lime. [1913 Webster]
  • Calcareous spar. See as Calcite. [1913 Webster]

Definition of 'calcareous spar'

From: GCIDE
  • Calcite \Cal"cite\ (k[a^]l"s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar. [1913 Webster]
  • Note: Argentine is a pearly lamellar variety; aphrite is foliated or chalklike; dogtooth spar, a form in acute rhombohedral or scalenohedral crystals; calc-sinter and calc-tufa are lose or porous varieties formed in caverns or wet grounds from calcareous deposits; agaric mineral is a soft, white friable variety of similar origin; stalaclite and stalagmite are varieties formed from the drillings in caverns. Iceland spar is a transparent variety, exhibiting the strong double refraction of the species, and hence is called doubly refracting spar. [1913 Webster]