Cold Mountain thunder eggs come from the Sierra Mountains between the cities of Aguascalientes and Zacatecas, Mexico. Generally, If you hear the word thunder eggs, most people quickly associate them as baseball size geode type stones filled with agate. In this case, this material is just a slight bit different. This material looks likes a bunch of golf balls and marbles all clustered together in a big muddy clump! Once you cut one open though, you will see all the beauty in it.This material resembles Butterfly jasper quite a bit, but certainly has it’s own beautiful characteristics. Thundereggs are found in flows of rhyolite lava. They form in gas pockets in the lava, which act as molds, from the action of water percolating through the porous rock carrying silica in solution. The cooled bubbles were gradually filled by water percolating through the porous rock carrying rich quantities of silica (quartz). The deposits lined and filled the cavity, first with a darker matrix material, then an inner core of agate or chalcedony. The various colors come from differences in the minerals found in the soil and rock that the water has moved through.The rhyolite is full of earthy colors, and the orbs have fractal patterns with rivers of agate running through them. When buying rough, you won’t really know what’s inside until you cut it. (slabbing)You can look for pieces with more orbs showing on the outside, and some with possible pieces broken off so you can see the patterns inside. Each piece will always be different, there will be no two slabs the same. This rough material will exhibit an excellent polish when fully tumbled! Great refill for any beginner-novice tumblers. Exhibits interesting "slabs" when cut. NOTE* This Bag DOES Not contain Grits, Findings, jewelry parts, or adhesives that may have been included with the original tumbler accessories. Use Tumbling instructions from the tumbler manufacturer. WARNING-CHOKING HAZARD! ADULT SUPERVISION RECOMMENDED.
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