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Product Description
Dugway Thunderegg Pair Polished Rock Geode Stone
Dugway Thunderegg from the famous Dugway Geode beds located far out in the desert East of Vernon, Juab County, Utah.
This thunderegg has been cut in half and polished on both faces.
In the first picture the one on the right is 2.7 inches by 2.5 inches and 1.15 inches thick. It's back has a natural indent-shown in the last picture.
The one on the left is 2.8 inches by 2.4 inches and 1.4 inches thick.
Dugway Thundereggs are generally geode-types with druse quartz crystals lining the blue to lavender agate rims.
A Thunderegg, is a spherical geode rock with a rough and unappealing surface, but when cut in half is filled with agate, jasper, quartz and/or other minerals. Typically, they are about two to six inches in diameter, although very large ones have been found!
Thundereggs were formed in the rhyolite lava flows and tuffs within the gas or steam pockets that served as molds. The pocket cavity was filled with silica-rich fluids and later solidified and crystallized. Mineral impurities are collected along the bands creating concentric colorful rings.
The name “thunderegg” is believed to have originated from Native American folklore. Native American legend reportedly considers the rocks to be the eggs of the thunderbirds which occupied Mount Hood and Mount Jefferson. Thunder Spirits on the mountains hurled the "eggs" at each other.
