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natural history page title
Identifying rocks, minerals and fossils
Introduction
What is a rock?
What is a mineral?
What is a fossil?
Rock, mineral or 
    fossil?
Rock key
    Sedimentary
      
    Igneous
        Fine 
             grained 
             key
        Pumice
        Obsidian
        Basalt
        Unknown fine 
            grained
        Coarse 
            grained key
        Granite
        Unknown 
            coarse 
            grained

    Metamorphic
    Unknown
Mineral key
Fossil key
 Helpful books
     

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 Igneous rock key - fine grained rocks


Read the descriptions below and choose the one that most closely describes the rock you are trying to identify. 

 

thumbnail image of pumice linking to more information

thumbnail of obsidian leading to more information

thumbnail image of basalt leading to more information

thumbnail image of graite leading to general information about fine-grained igneous rocks
Lightweight with lots of holes
Black (with or without white bits), look like glass Dark green or black, doesn't look like glass
My rock doesn't fit any of those descriptions