It does not stain, corrode or rust as easily as ordinary steel, and it is also hypoallergenic. Thus, it is extensively used in heavy gauge-welded components, such as jewelry. Tusk 316 stainless steel is of the highest quality for jewelry products.Plating: Two-Tone Gold (Ion Plating)Vacuum/Ion Plating the product is placed in a vacuum chamber, which is pumped down to the desired vacuum pressure.