Agate is a cryptocrystalline variety of silica, chiefly chalcedony, characterised by its fineness of grain and brightness of color.
(14" x 6") polished slab of something Mexican. I've been trying to get to shoot this for five years. Sorry I can't be more specific on exactly what this is. I thought I heard Agua Nueva but if there is such a thing as Mexican psychedelic lace this would be a great candidate. By Captain Tenneal