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Product Description
Lucky Strike Mine Thunderegg Agate Polished Stone
An agate thunderegg from the famous Lucky Strike Mine in Oregon that is slabbed and polished on one face and left natural rough on the back.
This larger piece is 8 inches by 6 inches and 1.5 inches at its thickest and weighs 2.25 lbs.
It does have a rough area on the top right. It does not stand on its own.
The Lucky Strike Mine is a pay-to-dig site in the Ochoco Mountains not far from Prineville, Oregon.
This site was discovered and then claimed by a famous miner named Leonard Kopinsky in the 1930s.
The Lucky Strike Mine is known for thundereggs that occur in a wide variety of colors (yellow, black, blue and red), sizes, and they can have moss, banded agate, waterlines, fortification, plumes and even crystals.
Thundereggs are found all over Oregon and have been Oregon's State Rock since 1965.
Richardson’s Rock Ranch, located northeast of Madras, is probably the most world-famous thunderegg deposit. There are several beds in the Priday area. The Priday Plume is a gorgeous mix of agate and opal with colorful plumes within a thunderegg matrix.
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.
