MgSi(OH)
Lizardite-1M, a member of the kaolinite-serpentine group, occurs very rarely at Mont Saint-Hilaire.
PHYSICAL CHARACTERISTICS:
Color is usually pale greenish-gray; terminations are tan to white.
Luster is dull to greasy.
Diaphaneity is opaque.
Crystal System is hexagonal; 31
Crystal Habits include tapered hexagonal crystals to 1mm terminated
by basal pinacoids.
Cleavage {001} is perfect.
Fracture is uneven.
Hardness is 2 – 3.
Specific Gravity is approximately 2.55 g/cm
Streak is white.
Associated Minerals include analcime, microcline, natrolite and pyrite.
Distinguishing Features: Crystal habit.
Origin: Named in 1956 after its discovery locality, in Kennack Cove,
The Lizard, Cornwall, England.
CLASSIFICATION:
Dana System
# 71.1.2b.2
Strunz Classification
# VIII/H.27-20
REFERENCES:
MinRec 21:319 (1990), Dana 8:1418-1420 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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