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: Amphibole
Alternate Specimen(s)
Fichter, Lynn S.
James Madison University
Class: SILICATES Subclass: Inosilicates (chain silicates)
Color
green - black
Chemical Formula: Ca2(Mg, Fe)4 Al(Si7Al)O22(OH, F)2
Streak
pale green
Luster
glassy
Hardness
5 - 6
Cleavage
2 directions Not 90o (Prismatic)
Density
3 - 3.4
Crystal Form
Monoclinic
Common Uses / Other Facts:
Crystal surface often striaped due to long parallel fractures along cleavage frames
rock
Sulfides and Sulfates
Halides
Organic
min