3.1" Polished Agate Nodule (Pair) - Zimbabwe, Africa
This is a beautiful, 3.1" wide banded agate nodule that has been cut in half and polished to a glossy-finish on both flat surfaces. This agate nodule was collected from Zimbabwe, Africa. Both haves are included and each half is accompanied by an acrylic display stand.
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.