The Polished Crystal Agate is a special example of the Natural Beauty of stone. This Crystal Agate Wall Clock has a 11.5 inch Diameter. The stone is approx. 7 x 6 inches and has Bands of Brown banding interwoven with clear/white crystals. The stone is offset from the background to allow natural light to bring out the colors. The hand made Red Oak wood background has an Natural gloss varnish. The Numbers and Hands are Black toned. The Quartz clock movement runs on a AA battery that's included.