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Aragonite crystals - click for larger pic
Aragonite crystals
© Modris Baum

Aragonite crystals - click for larger pic

Superb specimen of
aragonite - 5 x 4 cm
© Gilles Haineault

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Home > Mineral Descriptions > Aragonite - (2 Photos)



Aragonite
CaCO3

     Aragonite, a member of the aragonite group, is extremely rare at MSH.

PHYSICAL CHARACTERISTICS:

Color varies from colorless to white and pinkish yellow.
Luster is vitreous to resinous.
Diaphaneity is transparent to translucent.
Crystal System is orthorhombic; Pmcn.
Crystal Habits include aggregates of tabular crystals to 7mm; and
   . as cleavage fragments.
Cleavage: {010} is distinct and {110} is indistinct.
Fracture is subconchoidal.
Hardness is 3.5 - 4.
Specific Gravity is approximately 2.95 g/cm3.
Streak is colorless.
Associated Minerals include analcime, calcite, dolomite,
   natrolite, polylithionite, pyrite and siderite.
Distinguishing Features: Crystal habit.
Origin: Named in 1790 after the original locality in Aragon, Spain.

CLASSIFICATION:

Dana System
# 14.1.3.1

Strunz Classification
# V/B.4-10

REFERENCES:
MinRec 21:296 (1990), Dana 8:442-444 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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