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Hercynite
FeAl2O4

     Hercynite is a new addition to the suite of MSH minerals.

PHYSICAL CHARACTERISTICS:

Color is usually black.
Luster is vitreous.
Diaphaneity is opaque.
Crystal System is isometric; Fd3m.
Crystal Habits include octahedral embedded crystals.
Cleavage (??).
Fracture is (??).
Hardness is 7.5 - 8.
Specific Gravity is approximately 3.9 g/cm3.
Streak is dark gray-green to leek-green.
Associated Minerals include corundum.
Distinguishing Features: Crystal habit.
Origin: Named in 1847 from Latin Silva Hercynia for the Bohemian
   forest where the mineral was discovered.

CLASSIFICATION:

Dana System
# 7.2.1.3

Strunz Classification
# IV/B.01-20

REFERENCES:
Dana 8:297 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

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