CMT157 Cold Mountain Thunderegg Specimen Aquamarine This is a polished specimen

This is a polished specimen featuring foggy blue and red coloring with white bands

This Pyrite cube in Marl Matrix is from Navajún

and mounted on a base of Coral and Black Onyx

and the copper forms solidify in the cool water

CMT157 Cold Mountain Thunderegg Specimen Aquamarine This is a polished specimenA polished specimen featuring reddish brown, dusty peach tan, and translucent, blue gray chalcedony filling the thunderegg fracture pattern. 3" x 4. 5" x 2. 25" 1 lb 1. 1 oz 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