Natural Thunder Egg Agate GemstoneThunder Egg Agate is formed within layers of volcanic ash.
Thunder Egg Agate, also know as Amulet Stone, usually contain centers filled with chalcedony and look like ordinary rocks on the outside, but slicing them in half and polishing them often reveals intricate patterns and colors.
According to legend, "Thundereggs" were named by Native Americans of Central Oregon. The natives of this region are said to have believed these unusual agate-filled stones were thrown by angry, fighting "Thunder Spirits" or "Gods" who dwelt on Mount Jefferson and nearby Mount Hood, two of the several snow-capped peaks high in the Cascade Range.
It is said that Thunder egg agates help dispel negative energy and give balance and stability.