This material comprises a base metal, typically sterling silver, that is coated with a layer of gold. The gold plating must be of a specific thickness, generally a minimum of 2.5 microns, to be legally classified as such. The “18 karat” designation indicates that the gold used in the plating process is composed of 18 parts gold and 6 parts other metals, offering a balance of durability and gold purity. For example, a piece of jewelry described as this has a core of sterling silver with a substantial layer of 18 karat gold electroplated onto its surface.
This type of metal offers a compelling combination of aesthetic appeal and relative affordability. It provides the visual richness and perceived value of gold jewelry at a price point significantly lower than solid gold alternatives. Historically, this has served as an accessible option for individuals seeking the look of fine jewelry without the investment required for solid gold pieces. The substantial gold layer also contributes to the piece’s tarnish resistance and longevity, compared to thinner gold plating.