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Magnesite
Mg(CO)3

     Magnesite is much rarer at MSH, than siderite, its Fe-rich member of the magnesite series.

PHYSICAL CHARACTERISTICS:

Color is usually pale grayish green.
Luster is vitreous to dull.
Diaphaneity is transparent.
Crystal System is hexagonal; R3c.
Crystal Habits include modified rhombohedra to 2mm.
Cleavage {1011} is perfect.
Fracture is conchoidal.
Hardness is 3.5 - 4.5.
Specific Gravity is approximately 3.0 g/cm3.
Streak is white.
Associated Minerals include calcite, marcasite, muscovite,
   pyrite, quartz and siderite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1807 from the Greek magnesia lithos, magnesian
   stone, a kind of ore from Magnesia, the coastal district of ancient
   Thessaly, Greece.

CLASSIFICATION:

Dana System
# 14.1.1.2

Strunz Classification
# V/B.02-30

REFERENCES:
MinRec 21:321 (1990), Dana 8:434-435 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

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