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Igneous Rocks


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Description:   Fine to medium-grained with biotite.
Description:   Dark gray, with hornblende as the dominant mafic mineral.
Description:   Pink feldspar mineral with a moh's hardness 6.
Description:   Pyroxenite is ultramafic igneous rock made up of primarily pyroxene minerals.
Description:   Volcanic glass with snowflakes embedded throughout.
Description:   Dark gray, composed mostly of pyroxene and olivine.
Description:   Dark gray with abundant gas pocket vesicles.
Catalog Number: (470025-348)

Description:   Study the Formation of Different Igneous Rocks
Description:   Medium-grained with biotite.
Description:   Classic, very coarse-grained igneous texture.
Description:   Light gray, with flow structure.
Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
Catalog Number: (470106-756)

Description:   <i>Includes</i>: six each of obsidian, pumice, and basalt. Set of 18.<BR><BR>Common rocks and minerals for testing and identification studies are 2–3cm each.
Catalog Number: (470026-142)

Description:   Banded volcanic glass.
Description:   Abundant small black phenocrysts in a gray to brown matrix.
Description:   Coarse-grained plagioclase and pyroxene with some olivine.
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