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Igneous Rocks


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Description:   Obsidian is hard black colored, volcanic glass.
Description:   Gray andesite with large, blocky hornblende phenocrysts.
Description:   Coarse-grained, with microcline, biotite and horblende phenocrysts.
Description:   Classic, very coarse-grained igneous texture.
Catalog Number: (470025-348)

Description:   Study the Formation of Different Igneous Rocks
Description:   Pegmatite is igneous rock similar to granite but with larger crystals.
Description:   Grayish black trap rock.
Description:   Introduce your students to Gray Andesite with large phenocrysts of hornblende.
Description:   Anorthosite is an intrusive, igneous rock consisting of predominantly plagioclase feldspar.
Description:   Pyroxenite is ultramafic igneous rock made up of primarily pyroxene minerals.
Description:   Medium-grained with biotite.
Description:   Gray, fine, friable, with abundant small sanidine crystal fragments.
Description:   Dark gray, with hornblende as the dominant mafic mineral.
Description:   Classic, dark; from the Columbia Plateau.
Description:   Diorite is a mix of dark pyroxene and light andesine provides perfect representation of an intermediate igneous rock.
Description:   Syenite a light-colored rock consisting of feldspars and 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 call is still displayed and you need assistance, please call us at 1-800-962-2660.
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