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Dominant species
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Almandine
Chemical
Formula
Fe2+3Al2Si3O12
Species
Silicates
Crystal
System
Isometric
Mohs
Scale
7
Specific
Gravity
4.05
Color
reddish orange to red, slightly purplish red to reddish purple and usually dark in tone
Streak
White
Luster
Vitreous, Resinous
Refractive
Index
n = 1.83
Diaphaneity
Transparent, Translucent
Cleavage
none
Fracture
Sub-Conchoidal
Crystal Habit:Typically well-formed dodecahedra or trapezohedra, to 1 m; also in rounded grains and massive.
Geological Setting:The most common garnet, typically in mica schists and gneisses, from regionally metamorphosed argillaceous sediments and pelites; also in contact metamorphic hornfels. In granites and eclogites; in sedimentary rocks; as a detrital mineral.
Almandine3656
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Almandine3594
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Almandine3582
Almandine3582
Almandine3578
Almandine3578
Almandine3575
Almandine3575
Almandine3569
Almandine3569
Almandine3565
Almandine3565
Almandine3562
Almandine3562
Almandine3560
Almandine3560
Almandine3558
Almandine3558
Almandine3556
Almandine3556