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Ward's Science Essentials® Obsidian
Clearance
Obsidian is hard black colored, volcanic glass.
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Ward's Science Essentials® Breccia
Clearance
Breccia is a sedimentary rock made up of angular rock fragments.
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Ward's Science Essentials® Pink Marble
Clearance
Pink/grey marble colored metamorphosed carbonate rock.
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Ward's® Black Sand
Clearance
1 pound of black sand packaged in a heat-sealed bag.
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