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Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks
Sedimentary Rocks | Pictures, Characteristics, Textures, Types
Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types
Metamorphic Rocks | Pictures of Foliated and Non-Foliated Types
Meteorite Identification: Have you found a space rock?
Iron Ore: Sedimentary Rock - Pictures, Definition & More
The Most Difficult Rocks to Identify | Teaching Rock Identification
Verdite and Buddstone: Green rocks containing fuchsite
Stone Meteorites: Their Origin, Classification, Pictures - Geology.com
Gemstones: Facts, photos, and information for over 100 gems.