[1] : The Collaborative International Dictionary of English v.0.48

calcite \cal"cite\ ka^l"simact, 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
see also:
calc-spar calcareous spar 

[2] : The Collaborative International Dictionary of English v.0.48

calcareous \calca"reous\, 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
see also:
calx calcareous spar calcite 

Spar >> S Words
Spar, definition of term: Spar
spar_pag1.html

Calcareous >> C Words
Calcareous, definition of term: Calcareous
calcareous_pag1.html

Bitter Spar >> B Words
Bitter Spar, definition of term: Bitter Spar
bitter+spar_pag1.html