Augite
(Ca,Mg,Fe2+,Fe3+,Al,Ti)2(Al,Si)2O6

     Augite is extremely rare at MSH. A single crystal had been found and is now lost. Any information on this species from MSH would be appreciated.

PHYSICAL CHARACTERISTICS:

Color is brown green, green, light brown, dark brown, black.
Luster is vitreous to resinous.
Diaphaneity is translucent to opaque.
Crystal System is monoclinic; C2/c.
Crystal Habits include granular crystals in matrix.
Cleavage: [110] is perfect, [010] is indistinct.
Fracture is conchoidal.
Hardness is 6 - 6.5
Specific Gravity is approximately 3.4 g/cm3.
Streak is greenish gray .
Associated Minerals include (??).
Distinguishing Features: Brittle.
Origin: Named in 1792 from the Greek auge, bright, referring to its
   appearance of its cleavage planes.

CLASSIFICATION:

Dana System
# 65.1.3a.3

Strunz Classification
# VIII/F.1-90

REFERENCES:
Dana 8:1299-1301 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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