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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® Coals, Set Of 4
A classroom set that covers the major types of coal.
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Calcite (Chalk)
Classic, white chalk, massive; from Cliffs of Dover, England.
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Ward's® Corundum
Crystals and crystal sections up to 1", Mohs’ hardness of 9.
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