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Classroom Minerals
Mineral specimens are cut in a variety of sizes to meet various user needs, with common uses including identification on the part of students, displays to be used during lectures and demonstrations, or as chips for convenient physical identification tests in labs. These mineral specimens also demonstrate a number of classic geological features, such as cleavage, and collections of minerals can be used to test the Mohs hardness of other minerals and compare them.
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Ward's® Quartz (Milky)
White, massive, coarse crystalline vein, Mohs’ hardness of 7.
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Pyrite (Best Grade)
Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.
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Ward's® Labradorite (Cleavage)
Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.
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Ward's® Hornblende (Cleavage)
Amphibole group; dark greenish black cleavages, somewhat columnar.
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Ward's® Sphalerite (Crystalline)
Dark brown to black; polycrystalline zinc ore.
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Ward's® Oligoclase
Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.
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Ward's® Magnetite (Lodestone)
Spinel group; iron-black, massive; natural magnet.
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Ward's® Magnetite (Crystalline)
Spinel group; black, dull metallic luster; common iron oxide.
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Ward's® Quartz (Chert)
Light gray, compact, hard, opaque, microcrystalline silica mineral.