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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