Agate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz. It is characterized by its fineness of grain and variety of color. Although agates may be found in various kinds of host rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.Agate is one of the most common materials used in the art of hardstone carving,Luxury Agate Home Decor such as Agate And Quartz Coasters, Agate Candle holders / T lites, Agate Table Tops and Agate Bookends and so on.