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Ward's Science Essentials® Limonite
Clearance
Earthy, yellow brown iron ore.
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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 Science Essentials® Obsidian
Clearance
Obsidian is hard black colored, volcanic glass.
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Ward's Science Essentials® Gypsum
Clearance
Massive sedimentary gypsum with a moh's hardness 2..
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Ward's Science Essentials® Siltstone
Clearance
Gray to tan clastic rock made of silt sized particles.
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Ward's Science Essentials® Gabbro
Clearance
Gabbro is Mafic igneous rock formed deep underground consisting of olivine and pyroxene.
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Ward's Science Essentials® Gray Slate
Clearance
Gray metamorphosed shale showing "slaty cleavage".
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Ward's Science Essentials® Chert
Clearance
Chert is a microcrystalline, hard, silica mineral.
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