CMT158 Cold Mountain Thunderegg Specimen Copper From Agouim

From Agouim

The shells are preserved in marine rock

All of the cabs shown are cut and polished by hand in our lapidary shop in Cedarburg

Between 11 mm and 20 mm long

The chemical symbol for Bismuth is Bi

CMT158 Cold Mountain Thunderegg Specimen Copper From AgouimA polished specimen featuring reddish brown, dusty peach tan, and translucent, blue gray chalcedony filling the thunderegg fracture pattern. 3. 75" x 3" x 2" 13. 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 of