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Chert Is a Distinct Rock and Gem That Comes in Many Pretty Variations | Metamorphic rocks, Sedimentary, Minerals
many different colored rocks and gravel together
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Chert Is a Distinct Rock and Gem That Comes in Many Pretty Variations

Chert is a distinct rock type that comes in many different variations and shades of colors, including some familiar gemstones.
Carolyn Green
Carolyn Green

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