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: Chalcedony
 
Class: SILICATES Group: Tektosilicates
Color
Gray
Chemical Formula: Si O2
Streak
White
Luster
dull, waxy
Hardness
7
Cleavage
none
Density
2.6
Crystal Form
Trigonal/Hexagonal/Micro
crystalline
Common Uses / Other Facts: Crystals can only be seem under a microscope
rock
Sulfides and Sulfates
Halides
Organic
min