Size, shape and crystal structures vary. Each piece is unique.
Geodes are one of the earth's little treasures. They form in geothermal regions, where volcanic gasses seep upward through the earth. Over time, the gasses deposit layers of minerals, usually quartz, creating nodules of agate with hollow, crystal lined caverns.
These Occo geodes have been cut and polished on the face. they are excellent in terrarium, large or small. Because the outer shell is rough, they can be used to create little "boulders" in your landscape that reveal their secret when viewed from the right angle.
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