What is a casket that is made from copper metal with combined copper ions called?

The casket made from copper metal with combined copper ions is accurately referred to as a copper alloy casket. Copper alloys are created when copper is combined with other metals or elements, resulting in a new material that possesses unique properties derived from the constituent metals. This particular process typically enhances the strength, corrosion resistance, and aesthetics of the material, making it suitable for use in casket production.

When discussing the other options, a bronze casket comprises a specific alloy of copper and tin, which is distinct from what is described in the question. A copper deposit casket might imply a method of copper being applied to another surface but does not adequately define the concept of a casket consisting of combined copper ions. Metal composite caskets generally refer to caskets made from a combination of different metal types or styles but again do not focus on the context of copper specifically combined with other elements. Thus, the term copper alloy casket is the most precise and appropriate choice.