Pure copper, zinc alloy, cast iron, which of the three materials has the highest hardness?

Pure copper, zinc alloy, cast iron, which of the three materials has the highest hardness?

Lamps made of zinc alloy and copper have texture, but zinc alloy is integrally formed, or a combination of several parts, the cost of the mold is relatively high, and the surface is relatively smooth, but if cast iron is to make a pattern effect, it should not be available in the market at present. Compared with copper material, copper material is generally treated with dyed surface, cast iron  can be used as dewaxed parts, foundry parts, and the pattern is clearer, especially for antique effect, which is more high-end