Ad: I'm Igneous Don't Take Me For Granite Postcard
Showcase your wry earth science / rock hound side the next time you go rock hunting with any of these wry scientific saying gifts featuring a basic classification scheme for igneous rocks according to their mineralogy (primarily on silica content) along with the saying "I'm Igneous Don't Take Me For Granite". myGeology
#igneous #dont #take #Postcard
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