7.8" Polished, Banded Agate Slab - Brazil

Polished, Banded Agate Slab - Brazil #198074

This is a richly colored piece of banded agate that has been cut flat and polished on both sides. This specimen was collected from southern Brazil and features a variety of colors of agate including orange, yellow and red. It comes with an acrylic display stand.

Note: It is likely this slab has been heat treated due to how dark the colors are.

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.

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