Thunderegg! - Colorado Prospector - Gem and mineral prospecting and mining forums

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JJCA

Jul 4 2020, 11:59 AM

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We borrowed a rock saw and found out that the rock we had was indeed a thunderegg! Does anyone have thoughts on what the yellow may be? Also, what’s the best way to polish something like this? Thanks so much!

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JJCA Thunderegg! Jul 4 2020, 11:59 AM

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