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"PARKWAY PLASTICS, INC."
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Compound Hand Magnifier
Two or more magnifiers may be snapped together to produce increased magnification and to illustrate the principles of compound lenses.
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Ward's® Gypsum (Alabaster)
White, fine, massive, opaque to slightly translucent.
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Ward's® Obsidian
Shiny black volcanic glass showing conchoidal fracture and some spherulites.
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Ward's® Tuff (Rhyolitic)
Gray, fine, friable, with abundant small sanidine crystal fragments.
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Ward's® Anorthoclase
Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.
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Ward's® Peridotite (Coarse-Grained)
Dark gray, composed mostly of pyroxene and olivine.
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Ward's® Muscovite (Cleavage)
Mica group; cut sheets showing basal cleavages. Books and sheets in bulk pack.
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Sterilizing Tote Box, Natural, Polypropylene
Sterilizing tote boxes are molded from natural polypropylene, and are suitable for food use.
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Ward's® Granite (Porphyritic)
Coarse-grained, with microcline, biotite and horblende phenocrysts.
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Ward's® Experiencing Forces Lab Activity
What Is Making the Block Stop Moving?
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Ward's® Azurite
Bright blue crystalline veins and coatings in a matrix of mixed copper ore.