A single round of ammunition. It has a gold-colored casing and a copper-colored bullet. The bullet is pointed at the tip and has a cannelure near the base. The casing is slightly tapered and has a headstamp that is not visible in the image. The round is likely a centerfire cartridge, as there is no rim on the base of the casing. Centerfire cartridges are typically used in rifles and pistols, while rimfire cartridges are typically used in smaller firearms such as handguns and shotguns.