Method for making a jewelry ring

A method for making a jewelry ring comprising a substrate, a first coating of a metallic nitride or a metallic boride, and an external metallic coating, the method comprising

• forming the substrate into a ring shape;
• depositing the first coating onto the substrate;
• and
• depositing the external metallic coating onto the first coating, the external metallic coating surrounding the first coating such that the external metallic coating is outermost, wherein the external metallic coating includes at least one item from at least one of group
• (a) chromium-titanium nitride (CrTiN), aluminum-titanium nitride (AlTiN), aluminum-titanium-chromium nitride (AlTiCrN), tungsten nitride (WN), tungsten carbide, tungsten, zirconium, cobalt chrome, cobalt chromium, nitinol, aluminum carbide, vanadium, copper, brass, bronze, tungsten copper, zinc, tin, German silver, niobium, molybdenum, hafnium, rhenium, chromium, silver nitride, aluminum nitride, vanadium nitride, tantalum nitride, tantalum carbide, and cobalt chrome molybdenum, or any combination thereof, or
• (b) cobalt and tantalum, excluding gold (au).

A method for making a metallic article consisting of a substrate, a first coating of a metallic nitride or a metallic boride, and an external metallic coating, the method comprising:

• forming the substrate into a ring shape;
• depositing the first coating onto the substrate;
• and
• depositing the external metallic coating onto the first coating, the external metallic coating surrounding the first coating such that the external metallic coating is outermost, wherein the external metallic coating includes at least one item from at least one of group
• (a) chromium-titanium nitride (CrTiN), aluminum-titanium nitride (AlTiN), aluminum-titanium-chromium nitride (AlTiCrN), tungsten nitride (WN), tungsten carbide, tungsten, zirconium, cobalt chrome, cobalt chromium, nitinol, aluminum carbide, vanadium, copper, brass, bronze, tungsten copper, zinc, tin, German silver, niobium, molybdenum, hafnium, rhenium, chromium, silver nitride, aluminum nitride, vanadium nitride, tantalum nitride, tantalum carbide, and cobalt chrome molybdenum, or
• (b) cobalt and tantalum.