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Dolomite
(shown here with
magnesite
) is an anhydrous
carbonate mineral
composed of
calcium
magnesium
carbonate
. It forms white, tan, gray, or pink crystals, which do not react with dilute
hydrochloric acid
. Termed "stinking stone" by naturalist
Belsazar Hacquet
, the mineral gives the smell of petroleum when rubbed. It has multiple uses, including as a radiation buffer and a
catalyst
for destruction of
tar
.
Photograph:
Didier Descouens
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