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Habit: Fine grained aggregates (massive)
Colours: Colourless, white, gray, yellow-brown, pink, rose red
| ||Crystal System: Hexagonal|
Cleavage: Perfect rhombohedral
Reaction with HCl: Strong
Identification in hand sample:
Recognized by hardness and cleavage. Dolomite and aragonite have higher densities.
Common as a cementing agent in clastic sediments, or as fossil fragments. Essential constituent of limestone.
Industrial / ecomonic uses:
Used in the manufacture of portland cement (quicklime). Also used as a pharmaceutical (antacids, calcium supplements).