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Sugilite crystals - click for larger pic
Sugilite crystals - 8mm
© Gilles Haineault

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Sugilite
KNa2(Fe3+,Fe2+,Mn2+,Al)2Li3O30 · nH2O

     Sugilite is moderately rare at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually pale pink.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is hexagonal; P6/mcc.
Crystal Habits include poor intergrown, striated prismatic crystals.
Cleavage none apparent.
Fracture is (??).
Hardness is 5.5 - 6.5
Specific Gravity is approximately 2.75 g/cm3.
Streak is white.
Associated Minerals include pectolite, polylithionite, poudretteite
   and quartz.
Distinguishing Features: Crystal habits.
Origin: Named in 1976 after Ken-ichi Sugi (1901-1948), Japanese
   petrologist who found the specimens in 1944.

CLASSIFICATION:

Dana System
# 63.2.1a.9

Strunz Classification
# VIII/E.22-110

REFERENCES:
Dana 8:1275-1276 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
¤¤

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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