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WardsSci000450
Description:
Coarse-grained plagioclase and pyroxene with some olivine.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Dark gray, with hornblende as the dominant mafic mineral.
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:
Dark gray, composed mostly of pyroxene and olivine.
Description:
Light gray, with flow structure.
Description:
Dark gray with abundant gas pocket vesicles.
Description:
Glassy; most specimens float in water.
Description:
Fine to medium-grained with biotite.
Description:
Pegmatite is igneous rock similar to granite but with larger crystals.
Description:
Classic, dark; from the Columbia Plateau.
Description:
Gabbro is Mafic igneous rock formed deep underground consisting of olivine and pyroxene.
Description:
Gray-to-brown basaltic, with over 50% vesicles.
Description:
Pale pink felsite, with small sanidine phenocrysts.
Description:
Introduce your students to Gray Andesite with large phenocrysts of hornblende.
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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 is still displayed and you need assistance, please call us at 1-800-962-2660.
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