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: Orthoclase (Potassium Feldspar)
Alternate
Specimen(s)
  

Fichter, Lynn S.
James Madison University
Class: SILICATES Group: Tektosilicates (framework silicates)
Color
white, green, or pink
Chemical Formula: KAlSi3O8
Streak
white
Luster
glassy
Hardness
6 - 6.5
Cleavage
2 directions at 90°
Density
2.6
Crystal Form
Monoclinic
Common Uses / Other Facts: Used in the porcelain industry.
rock
Sulfides and Sulfates
Halides
Organic
min