Thunder Egg
A variety of Rhyolite
Uncommon
What is Thunder Egg?
The Thunder Egg is a geode-like structure of different minerals, usually in crystalline forms, layered together into a solid structure. The outside is normally an ordinary dull gray or brown rock over a layer of brown or red rhyolite, but the inside can contain concentric rings and layers of quartz crystal, chalcedony, agate, and even opal.
Thunder Egg Market Value Calculator
Estimate the market value of Thunder Egg using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Thunder Egg Localities Map
See where Thunder Egg is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Key Characteristics
Composition of Thunder Egg
Rhyolite, Agate
More Images
© Cacophony
© Lech Darski
© David Rix Eibonvale
Quick Facts
Physical Properties
- Hardness (Mohs)
- 6 - 7
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