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Grossular
Ca3Al2(SiO4)3

     Grossular, a member of the garnet group, is relatively rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually bright orange to orange-brown or reddish brown.
Luster is vitreous to adamantine.
Diaphaneity is transparent to translucent.
Crystal System is isometric; Ia3d.
Crystal Habits include sharp trapezohedrons to 10mm.
Cleavage none.
Fracture is subconchoidal.
Hardness is 7.
Specific Gravity is approximately 3.6 g/cm3.
Streak is white.
Associated Minerals include albite, allanite, calcite, epidote,
   fluorite, microcline, molybdenite, prehnite, pyroxene group,
   pyrrhotite and titanite.
Distinguishing Features: Crystal habit and luster.
Origin: Named in 1811 for its ressemblance to pale green
   specimens of the gooseberry, whose botanical name is
   Ribes grossularia.

CLASSIFICATION:

Dana System
# 51.4.3b.2

Strunz Classification
# VIII/A.08-70

REFERENCES:
MinRec 21:313 (1990),Dana 8:1046-1048 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
¤¤

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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