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Igneous Rocks

Rock specimens are useful for studying textures, grain sizes, and other features altered by pressure, temperature, and other natural forces. Different select categories of rock specimens are available for purchase as well, including metamorphic, igneous, and sedimentary rocks. Sets of rock specimens are housed in compartmentalized collection boxes, with descriptions of each specimen printed for easy confirmation of identification. These rock specimens are carefully selected to be the highest quality to provide students with a suitable introduction to earth materials and their characteristics.

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Ward's® Rhyolite (Gray)

Ward's® Rhyolite (Gray)

Light gray, with flow structure.

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Ward's® Tuff (Rhyolitic)

Ward's® Tuff (Rhyolitic)

Gray, fine, friable, with abundant small sanidine crystal fragments.

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Ward's® Andesite (Porphyry)

Ward's® Andesite (Porphyry)

Gray andesite with phenocrysts of felspar and/or hornblende.

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Ward's® Basalt (Flood)

Ward's® Basalt (Flood)

Classic, dark; from the Columbia Plateau.

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Ward's® Diorite

Ward's® Diorite

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

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