Location Name: Polkadot Agate Mine / Canyon Rim Thundereggs
Materials: Thundereggs
GPS: 44.76502, -120.82862
When using GPS coordinates to navigate to locations in the backcountry sites like Google will often make mistakes. Please watch this video before venturing out. https://youtu.be/hQr1l7dnCE4
Tools: Hammer, pry-bar, geo-pick and a shovel.
Vehicle: Any
Date Visited: July 2022 & September 2023
Additional comments: I would bring lots of water to this location in the summer months and cash for paying for your thundereggs.
The Polka Dot Agate Miners Facebook Group is the best place to stay up to date with what they have going on at the mine.
Any Location Updates Since Visit:
2022 Visit:
2023 Visit:
Thunderegg Fluorescence
All the thundereggs that I have collected from this location display a nice green fluorescence under UV light of all spectrums. I find the midwave 310nm to be the most appealing.
What is the cause of this fluorescence? Good question, I’m not exactly sure, but I have seen the statement in a number of online groups that it is uranyl-activated green fluorescence which has the potential to emit radiation. Of all the thundereggs I have tested with my Geiger Counter, none have any detectable levels of radiation.
Polka Dot Agate
The Polka Dot agate is rather nice and can take a fantastic polish. At least at the time of creating this listing in July 2022 the digging of this material by the public isn’t happening but there’s more than enough of it on site for those who want to pick from the pile and buy it.
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