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:

REFERENCES:
Dana 8:1275-1276 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend