Thundereggs-Thunderegg halves, Rare Thundereggs

	What is a Thunderegg ? Thundereggs are spherical masses of rock that range in size from less than an inch to four feet in diameter . Most are about the size of a baseball . They have a knobby rind of drab , siliceous rock and a cavity filled with agate . From the out side they appear nondescript , but when sawed open and polished they may reveal the most exquisite and colorful designs ranging from five-pointed stars to miniature gardens .
	History of The Name : The Warm Springs Indians have been given credit for "long ago" originating the name . As the legend goes, ". . . the two adjacent snow capped peaks - - Mt. Hood and Mt. Jefferson - - would at times become angry with one another . During these disputes, accompanied with thunder, Mt. hood and Mt. Jefferson would hurl these spherical masses of rock at each other . Stray shots would land over in the Indian reservation, hence the Indian name of ' thunder eggs '."
	Origin of Thundereggs : Thundereggs are only found in areas of previous volcanic activity . As silicic lavas poured out on the ground, the gasses made it frothy and bubbly . The lava cooled and over a period of millions of years, became buried . Water, which contains many minerals including silica, penetrated the gas pockets through a crack in the nodule. As water slowly dissipated, the solution deposited agate ( chalcedong SiO2 ) .

Welcome to the Thunderegg section of our store. Here you will find many different types of Thundereggs that we have dug from several locations.

All of our products are unique collectables and will be sold on a first come first serve basis, and will be removed from inventory.

Please refer to each item for individual descriptions and dimensions.

Please click on Thunderegg Photographs to enlarge.

This site was last updated 07/03/10