This Specimen has been sold.
4" Polished Smugglers Moss Agate Slab - Mexico
This is a 5.9" wide polished slab of smugglers moss agate that was collected from Mexico. It has been cut flat and polished to a glossy finish on both sides.
Moss agate is a variety of chalcedony, frequently containing colorful (green, red, brown, etc..) mineral inclusions or brown to black dendrites of iron or manganese oxides.
Agate is a variety of microcrystalline quartz (chalcedony) 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.