The Rocks & Minerals Challenge Game
 
Mineral Identification by Picture and Attribute
Explorers! Before you begin your journey, you need to recognize these geological specimens.
 
Begin by selecting one of the specimens pictured.
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Inosilicates, Neosilicates, Sorosilicates
    
   
Oxides, Hydroxides,
Carbonates
Silicates
          
min min
Name: Garnet
Alternate Specimen(s)
Fichter, Lynn S.
James Madison University
Class: SILICATES Subclass: Neosilicates (isolated tetrahedra silicates)
Color
dark red
Chemical Formula: Fe3Al2(SiO4)3, Ca3Al2(SiO4)3, Mg3Al2(SiO4)3
Streak
white
Luster
glassy
Hardness
6 - 7.5
Cleavage
none (conchoidal fracture)
Density
3.5 - 4
Crystal Form
Cubic (Isometric)
Common Uses / Other Facts:
Varieties: (Fe) Almandine - Blood Red
(Ca) Grossular - Orange/Green
(Mg) Pyrope - Red
rock
Sulfides and Sulfates
Halides
Organic
min