calcite (Scope note)
This term is taken to include the banded variety of stone alternatively known as 'Egyptian alabaster' or 'calcite-alabaster', a crystalline form of calcium carbonate. The suggestion by some authorities to use the term 'travertine' for Egyptian alabaster (ie. calcite) is not generally accepted. 'Spar' is an archaic term referring to a well-formed, generally transparent or translucent crystal referring to either feldspar, fluorspar, or dog-tooth spar (ie. calcite).