3" Coyamito Agate Geode Half - Chihuahua Mexico

This is a beautiful Coyamito agate geode half from Chihuahua, Mexico. The calcite inclusion inside shows light fluorescence under both long- and short-wave UV light.

An acrylic display stand is included with this specimen.

Coyamito agate is some of the most beautiful and rare of the Northern Mexican agates. Featuring blues, browns, reds, and even sometimes pink, Coyamito agate is most often found as small geodes.

Agate is a variety of microcrystalline quartz that displays translucence and in some cases banding. Agate primarily forms when silica-rich fluids fill pockets within rock and/or fossils, resulting in deposition of the silica along the walls of the rock. This process can result in banding patterns as the composition and impurities of the fluids change over time. These banding patterns can either form as flat layers or rounded layers, depending on the surfaces available for deposition.
Quartz var. Agate
Chihuahua, Mexico
3" wide, 1.8" deep