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Ward's Science Essentials® Conglomerate
Clearance
Conglomerate is a sedimentary rock made up rounded quartz pebbles.
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Ward's Science Essentials® Chert
Clearance
Chert is a microcrystalline, hard, silica mineral.
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Ward's Science Essentials® Scoria
Clearance
Scoria is a dark-colored rock formed from lava with a high gas content.
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Ward's Science Essentials® Limestone
Limestone is a gray calcium carbonate that will fizz with dilute HCl.
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Ward's Science Essentials® Shale
Shale is a rich, gray fissile clay rock.
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Ward's Science Essentials® Bituminous Shale
Bituminous rich black shale for hands-on investigations.
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