They are nickel white gold with a very heavy rhodium plating that
finally wore off and both of the people have an allergy to nickel
something that is fairly common."
Update on this is that the husband came back with his ring and it is
stamped plat and the back of the shank is distorted as a platinum
ring might bend as the metal is soft and the back of the shank is
thin. At this point the rings are going to get a thorough cleaning
and the couple are going to try using an antifungal for two weeks.
The rings have a significant amount of space under the top of the
ring for moisture to collect. However they have had the rings since
2002 and this problem started only several months ago. They have
moved to different houses 3 times since purchasing the rings.
I knew that it was unlikely that it was an allergic reaction by two
people at the same time to the metal. I knew that it might be caused
by soap or cream they were both using. I did not know about fungal
infection as a cause. Thanks to everyone for input, I will update
when I know more.
Richard Hart G.G.