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Thunderegg - SI02


Mineral Profile

Thunderegg -Mineral Profile


Thunderegg is a unique agate-filled rock formed within volcanic rhyolitic nodules.


Highly valued for lapidary purposes, thundereggs are often cut and polished to reveal intricate patterns.


Varied and vibrant, thundereggs showcase a spectrum of hues including blues, greens, reds, and browns. The inner agate formations often resemble stunning landscapes.


Exhibits a glossy and sometimes glassy luster, enhancing its visual appeal.


Moderately rare, with exceptional specimens fetching considerable interest among collectors.

Country of Origin:

Found in various locations worldwide, notable sources include the United States (Oregon), Germany, Mexico, and Australia.


Typically originates in volcanic rocks, specifically in rhyolitic formations, where gas pockets are filled with silica-rich fluids over time.


Ranges from 6.5 to 7 on the Mohs scale, ensuring durability and resistance to scratching.

Chemical Composition:

Composed mainly of silica (SiO2) in the form of agate, displaying intricate banding and patterns.

Crystal System:

Amorphous, lacking a defined crystal structure.


The name "thunderegg" is believed to originate from Native American folklore associating the rocks with thunder spirits.

Health Information:

Generally safe to handle, but as with any lapidary material, caution is advised to avoid inhaling dust during cutting and polishing.

Intended Healing:

Associated with the solar plexus and heart chakras.

Thought to promote protection, transformation, emotional balance, encourage connection, aid healing, enhance harmony, and provide a sense of grounding.

Thunderegg's captivating colors and geological origin make it a prized specimen in both lapidary arts and crystal healing practices. While it doesn't carry the same cautionary notes as some minerals, prudent handling during lapidary work is recommended. Always approach the metaphysical aspects with individual interpretation and discretion.

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