Summary for white gold ring spots Discussion
white gold ring spots quickly after sizing are most likely a rhodium plating problem, not a chemical spill. Ben Tindall asked why an expensive white gold ring developed spots only three days after wear, especially since it had been sized before purchase. David Vinson explained that most U.S. 14k white gold is naturally a gray-white alloy and is often rhodium plated to make it look brighter. He said the most likely cause is poor cleaning after sizing, leaving soldering flux, polishing compound, or pickling residue that prevented rhodium from bonding in those areas. He also noted that some jewelers apply rhodium too thinly, which can let contaminants show through and may be especially troublesome for nickel-sensitive wearers. His practical advice was to take the ring back, insist on a quality replate, and get a written guarantee that the plating will last at least two years. A second answer agreed it sounded like a terrible plating job.
Q. Hi,
I bought my Fiancee a white gold ring about two weeks ago, only about three days after she had worn it small spots began to appear on the surface. My first thought was that she had possibly spilled/sprayed a chemical on the ring. But she hadn’t, the ring was very expensive and I am beginning to wonder if I have made a mistake on the ring purchase. The jeweler told me about the plating but made it sound as if it would last a long time and that the plating was not a big deal, I am not out any money but very upset. Why did this ring get spots so fast? ( the ring had to be sized before I bought it, could this have done it?)
Ben Tindall
– Lexington, Kentucky
2001
A. Hi Ben, there is a very good chance your white gold ring was plated with a metal called rhodium. Most of the 14kt white gold sold in the U.S is an alloy of yellow gold and nickel (palladium is used sometimes instead of nickel). In both cases the natural color is more toward a gray white color (some alloys are yellowish gray). Rhodium is plated over the white gold to color enhance the “whiteness” of white gold. When done correctly,(I.e. clean surface, proper thickness) rhodium plating can be made quite durable. I own several rhodium plated cigarette lighters from the late 1930’s that are as bright and lustrous as when new.
Without the advantage of seeing the actual ring, there could be several reasons for the surface discoloration. However, there is a high probability that your ring was not properly cleaned after it was sized. Just prior to plating, residue from soldering flux or other contaminants(polishing compound) may have been present on the areas where the spots are. Contaminants will prevent the rhodium from being deposited on the white gold. Contaminants leftover from the pickling solution (removes scales and oxides after soldering)could also be the culprit.
In many jewelry operations rhodium is “pen plated” after the repair process. Regrettably, many jewelers are not necessarily good at providing durable plated finishes. They also have a tendency to use too thin a layer of rhodium due to the technical limitations of their plating chemicals, processes and equipment. If the rhodium is too thin, porosity in the rhodium will allow contaminants to “filter” through the openings in the rhodium layer and react with the nickel in the white gold. This is especially troublesome if the wearer is sensitized to nickel and develops a skin allergy. Nevertheless, Ben, plan on having your ring replated every 2 years or so.
I would recommend you take it back and insist on a quality replate of rhodium. Also get a memo in writing guaranteeing the plating will last for at least 2 years. That in itself will be a testament to the jewelers self-confidence in their own plating capabilities.
Good Luck,
David Vinson
Metal Arts Specialties – Leonard, Michigan
A. Sight unseen it sounds like a terrible plating job. See
“FAQ: White Gold Alert!” (to which David Vinson contributed greatly).
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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