To test for spelter, scratch the base of the piece. Zinc is also referred to in nonscientific contexts as "spelter". Bronze will appear as bright yellow while spelter will show a silvery scratch. Spelter has a post office with ZIP code 26438. Early twentieth-century Art Nouveau and Art Deco figures and lamps were often made of spelter. Zinc ingots formed by smelting might also be termed spelter. Caerau, borders Dyffryn and Spelter to the south in Nantyffyllon, Maesteg, Bridgend (). Spelter is a census-designated place (CDP) in Harrison County, West Virginia, United States.