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Tremolite
Ca2Mg5[Si8O22](OH)2

     Tremolite, a member of the amphibole group, is rare at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually colorless to dark blue and green.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is monoclinic, C2/m.
Crystal Habits include color-zoned prismatic crystals.
Cleavage {110} is perfect.
Fracture is splintery.
Hardness is 5 - 6.
Specific Gravity is approximately 3.1 g/cm3.
Streak is white.
Associated Minerals include amphibole group.
Distinguishing Features: Crystal habit and color zoning.
Origin: Named in 1790 after its discovery locality, in Val Tremola,
   Switzerland.

CLASSIFICATION:

Dana System
# 66.1.3a.1

Strunz Classification
# VIII/F.10-10

REFERENCES:
MinRec 21:343 (1990), Dana 8:1346-1350 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
¤¤

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

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