Polished Agate Slice Key Chain. Polished agate from Brazil. Agate brings stability to life. They make a great addition to any keys and helps them stand out with beauty and looks. (One) Assorted color or choose your favorite color for a few cents (.25 cents) more. Sizes vary as these are natural stones 2.5" - 3.5" inches long, the colored stones are dyed. Sold individually. If purchasing quantities use the assorted option and you will get a variety of colors and sizes of agate key chains.