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is the name of a sedimentary carbonate rock and a mineral, both
composed of calcium magnesium carbonate CaMg(CO3)2 found in
rock (also dolostone) is composed predominantly of the mineral
mineral dolomite crystallizes in the trigonal-rhombohedral
- It forms
white, gray to pink, commonly curved crystals, although it is
- It has
physical properties similar to those of the mineral calcite, but
does not rapidly dissolve or effervesce (fizz) in dilute
hydrochloric acid unless it is scratched or in powdered form.
occurs in a different crystal class than the Calcite Group.
Dolomite is generally formed from limestone by
dolomitisation, a diagenetic process involving replacement
of calcium in the calcite with magnesium.
Limestone and dolomite are mined by opencast methods and
sold either in bulk, powder or slurry form
Dolomite formed in relation to organic-rich marine sediments
has been termed organogenic dolomite.
type of dolomite is thought to be directly related to the
diagenetic processes of sulfate reduction, methane
oxidation, and methanogenesis
Dolomite is used as an ornamental stone, a concrete
aggregate and as a source of magnesium oxide.
Dolomite is used to make magnesia, which has important
Dolomite is used for manufacturing certain types of
refractory bricks used in steel making.
Dolomite is also used in some cements, as a source of
magnesium. Of course Dolomite is also used as mineral
is also an important petroleum reservoir rock and a host
rock for large strata-bound base metal (lead, zinc,
Significant uses of mined limestone and dolomite in
Pennsylvania include (1) crushed stone for roads,
concrete, and railroads; (2) agricultural lime and grit;
(3) the manufacture of cement; (4) fluxstone and
refractory materials for the steel industry; (5) acid
neutralization; (6) raw material for the glass industry;
and (7) mineral fillers and whiting.
Amongst the non-metallic minerals production in
India, more than 90 percent of the aggregate value
is shared by limestone, magnesite, dolomite, barytes,
kaolin, gypsum, apatite & phosphorite, steatite and
bulk of dolomite in the world is used for
aggregates. Though it is not economical, magnesium
can be also extracted from dolomite. In the medical
front, it is used for milk-of-magnesia preparation
and there are also claims that it could be used as a
magnesium supplement pills. In the oil industry,
depending on its nature dolomite could either
enhance or destroy petrochemical properties.
dimension-stone market for all rock types is
increasingly shifting away from imports of
unprocessed rock blocks towards slabs and finished
Slate, diabase, quartzite, and soapstone were
quarriedin the Piedmont province; slate was the
leading stone I type quarried, in terms of volume
(cubic feet) and value.
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