The correct answer is C. German Silver.
Ruby silver is an alloy of silver and copper. Lunar caustic is a chemical compound of silver nitrate and potassium nitrate. Horn silver is a mineral that is a form of silver chloride. German silver is an alloy of copper, nickel, and zinc.
German silver does not contain silver. It is an alloy of copper, nickel, and zinc. It is often used in place of silver because it is less expensive and has similar properties. German silver is often used in jewelry, tableware, and other decorative items.
Ruby silver is an alloy of silver and copper. It is a reddish-brown color and is often used in jewelry. Ruby silver is not as valuable as pure silver, but it is still a beautiful and durable metal.
Lunar caustic is a chemical compound of silver nitrate and potassium nitrate. It is a white powder that is used as a strong oxidizer. Lunar caustic can be used to remove hair, to etch glass, and to make silver nitrate.
Horn silver is a mineral that is a form of silver chloride. It is a white or gray mineral that is often found in association with other silver minerals. Horn silver is not as valuable as pure silver, but it is still a valuable mineral.