EISCO Raw Andesite, Igneous Rock Specimen - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms (1)

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About

ANDESITE
Andesite features abundant phenocrysts in a fine grained matrix, and offers a great demonstration of igneous porphyry
GREAT FOR GEOLOGY CLASSROOMS
Ideal for identification & classification exercises. Andesite is an excellent example of porphyry in igneous rocks. The fine-grained felsic matrix contains larger, identifiable hornblende crystals, indicating two different rates of cooling
GEOLOGIST SELECTED
Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features
LOCALLY PROCESSED
Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY
INDIVIDUALLY PACKAGED & LABELED
Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification