Sometimes one can find a hollow agate with water on the inside. This water most likely millions of years old. After the agate is formed, it has the sponge like porosity in the finely layered structure. The browns and reds by iron and the blacks by manganese. These compounds get into the agate with water born solutions that migrate through the sponge-like porosity of the finely layered agate leaving the beautiful colors and patterns you see.
Brazilian agate is mined from eroded lava beds in the Brazil plateaus.
This agate displays a rainbow of colors primarily derived from iron. The colors are usually reds, browns end yellows in multi-layered bands and plumes. Agate was known and used by the ancients. They believed it had the power to drive away evil and bring good luck. Feather Stone Feather stone characterizes the coloring and pattered found in Mother Nature's feathers.