Montana Iris Agate Silver Poppy Ring

Montana Iris Agate Silver Pendant

Montana Agate is a term that is given to the stunning Chalcedony that was found in the alluvial gravels of the Yellowstone River. The existence of silica from volcanic ash, as well as the water from rainfall that came out from ground sources, are quite essential for the structure of these Agates. A small portion of Montana Agates display a rainbow iridescence known as ‘‘Iris Agate”.