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A polished Cold Mountain Thunderegg specimen pair featuring a mix of muted red shades, ranging from slightly orange to deep brick to pinks, with a large slash through the center filled with translucent chalcedony.
Polished faces: 8.5cm x 7.2cm and 7.9cm x 7cm
Approx. 1.25" & 1.5" deep
1lb 3.1oz together
Cold Mountain Thundereggs are from the Sierra Mountains in Mexico. The thundereggs can contain water banding and feature red, mauve, or black “webbing.” While technically a rhyolite due to its thunderegg nature, Cold Mountain Thundereggs are highly silicate and feature large amounts of brecciation that has also been filled with silica, so this material takes an exceptional polish, making it ideal for both cabochons and specimens.