From the 1870s through the 1910s, white bronze was used as a raw material for grave markers by certain manufacturers. This type was mostly zinc, rather than tin alloy mostly used in jewelry. It was called white bronze as a marketing ploy to make it sound more attractive. Grave markers made of this material usually took on a pale gray or pale blue appearance and stood up to the elements better than stone markers because they were less porous. These grave markers were actually hollow and consisted of vertical panels held together by screws at the corners. It is said that outlaws sometimes took advantage of this fact and hid stolen goods inside the tall hollow monuments. White bronze is actually not bronze, but an alloy of varying amounts of copper, tin and zinc. It is commonly used in jewelry as a substitute for nickel.