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Almandine crystals - click for larger pic
Almandine crystal
Photo by Violet Anderson
©Royal Ontario Museum

Almandine crystals - click for larger pic
Almandine crystals
© Douglas Merson

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Home > Mineral Descriptions > Almandine - (2 Photos)



Almandine
Fe3Al2(SiO4)3

     Almandine is the newest member of the garnet group at mont Saint-Hilaire. It was recently identified by Bob Gault of the Canadian Museum of Nature from a specimen collected by the Horváths in September '99 from a contact zone of sodalite syenite and hornfels.

PHYSICAL CHARACTERISTICS:

Color is red.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is isometric; Ia3d.
Crystal Habits include embedded crystals and fragments.
Cleavage: none.
Fracture is subconchoidal.
Hardness is 7.5
Specific Gravity is approximately 4.0 g/cm3.
Streak is white.
Associated Minerals include calcite, fluorite, marcasite, mica group,
   microcline, pyrite and quartz.
Distinguishing Features: Crystal habit and luster.
Origin: Known since antiquity, it was described by Agricola in 1546.
   Name is derived from the locality at Alabanda, Turkey.

CLASSIFICATION:

Dana System
# 51.4.3a.2

Strunz Classification
# VIII/A.08-20

REFERENCES:
Dana 8:1039-1041 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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