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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® Igneous Rock Collection
Samples of Intrusive and Extrusive Igneous Rocks
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Ward's® Igneous Rock Set of 18
Includes: six each of obsidian, pumice, and basalt. Set of 18.
Common rocks and minerals for testing and identification studies are 2–3cm each.
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Ward's® Andesite (Hornblende)
Abundant small black phenocrysts in a gray to brown matrix.
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Ward's® Peridotite (Coarse-Grained)
Dark gray, composed mostly of pyroxene and olivine.
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Ward's® Tuff (Rhyolitic)
Gray, fine, friable, with abundant small sanidine crystal fragments.
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Ward's® Gabbro (Hornblende)
Dark gray, with hornblende as the dominant mafic mineral.
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Ward's® Granite (Porphyritic)
Coarse-grained, with microcline, biotite and horblende phenocrysts.
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Ward's® Obsidian
Shiny black volcanic glass showing conchoidal fracture and some spherulites.