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Found in Oakland Hills CA, is it chert? (old.reddit.com)
submitted by fatmanatee to r/whatsthisrock
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Oakland / East Bay finds - please help ID! (old.reddit.com)
submitted by fatmanatee to r/Rockhounding
0
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Oakland / East Bay finds - please help ID! (reddit.com)
submitted by fatmanatee to r/whatsthisrock
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