The Fallen Tree site is a private claim owned by Hinkle's Rock Shop. Many thundereggs are found with quartz (sometimes amethyst) centers while some came with white to gray banded agates often in form of horizontal bands.

Additional information can be found at Hinkle's Rock Shop: www.oregonthundereggs.com

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Rough Appearance: Faint gray thunderegg with yellow speckles. Shells tend to crumble.
Said to be filled mostly with quartz, but can have good banded or waterline agates.