Dolomite | Encyclopedia
dolomite 1. (pearlspar) Widely distributed rock-forming mineral, CaMg(CO 3) 2; sp. gr. 2.8–2.9; hardness 3.5–4.0; trigonal; usually white or colourless, but can be yellowish and brown; white streak; vitreous lustre; crystals are usually rhombohedral with curved, composite faces, also occurs massive and granular; cleavage perfect rhombohedral …
