Skip to product information
A polished Cold Mountain Thunderegg specimen pair featuring muted shades of red, orange, pink, and tan jasper with fused cracks of translucent chalcedony.
Polished faces: 8.4cm x 6.5cm and 8.3cm x 6.4cm
Approx. 1.25" & 1.5" deep
1lb 1.7oz 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.