CMT152 Cold Mountain Thunderegg Specimen From Mexico and pastel blue banded agate

and pastel blue banded agate with a small quartz center

and red-orange is scattered throughout and a section of clear quartz

Tiny dark brown speckles of dendrites are visible going back into one of the layers

and does take a nice shine

Each slab is unique and can have varying patterns of banding

CMT152 Cold Mountain Thunderegg Specimen From Mexico and pastel blue banded agateThis polished specimen displays tan, yellow, reddish brown, and blue gray, with four different sections of chalcedony with swirly banding. 5" x 3. 25" x 1. 5" 11 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 of