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Igneous Rocks


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Description:   Pink feldspar mineral with a moh's hardness 6.
Description:   Rhyolite is a pale, pink felsic rock with lower density than most igneous rocks.
Description:   Shiny black volcanic glass showing conchoidal fracture and some spherulites.
Description:   Coarse-grained plagioclase and pyroxene with some olivine.
Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:   Dark gray, composed mostly of pyroxene and olivine.
Description:   Dark gray, with hornblende as the dominant mafic mineral.
Description:   Light gray, with flow structure.
Description:   Grayish black trap rock.
Description:   Pumice is light colored glassy rock that floats in water.
Description:   Porphyritic igneous rock containing biotite, feldspar, and hornblende.
Description:   Gray, fine, friable, with abundant small sanidine crystal fragments.
Description:   Diorite is a mix of dark pyroxene and light andesine provides perfect representation of an intermediate igneous rock.
Description:   Gray andesite with large, blocky hornblende phenocrysts.
Description:   Introduce your students to Gray Andesite with large phenocrysts of hornblende.
Description:   Medium-grained with biotite.
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us at 1-800-962-2660.
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