Red Banded Agate 10mmBeautiful vibrant red and orange colors with a unique banding pattern of white colors throughout. Most Red Banded Agate occurs in cavities in eruptive rocks or ancient lavas causing banded structures they can be approximately parallel to the sides of the cavity. Red Banded Agate occurs by the accumulation of silica rich groundwater in rock voids, over thousands of years, and the beautiful banding developed within the voids of volcanic igneous rocks