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Igneous Rock Specimens


32  results were found
Specimens

Specimens are available for use in a wide variety of organic and inorganic testing procedures. Organic samples can be utilized for dissection purposes or studying whole preserved or life specimens, with practical examples in cellular biology or the internal structures of whole organs and complex multicellular systems. Rock specimens are useful for studying textures, grain sizes, and other features brought about by pressure, temperature, and other natural forces, offering a glimpse into the Earth’s geological history.


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Description:   Coarse-grained, with microcline, biotite and horblende phenocrysts.
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Description:   Porphyritic igneous rock containing biotite, feldspar, and hornblende.
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Description:   Classic, very coarse-grained igneous texture.
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Description:   Rhyolite is a pale, pink felsic rock with lower density than most igneous rocks.
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Description:   Obsidian is hard black colored, volcanic glass.
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Description:   Scoria is a dark-colored rock formed from lava with a high gas content.
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Description:   Gray andesite with large, blocky hornblende phenocrysts.
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Description:   Dark gray, with hornblende as the dominant mafic mineral.
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Description:   Coarse-grained plagioclase and pyroxene with some olivine.
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Description:   Shiny black volcanic glass showing conchoidal fracture and some spherulites.
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Description:   Dark gray, composed mostly of pyroxene and olivine.
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Description:   Light gray, with flow structure.
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Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
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Description:   Fine to medium-grained with biotite.
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Description:   Classic, dark; from the Columbia Plateau.
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Description:   Grayish black trap rock.
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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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