To all for what it’s worth,
Having been in this business for twenty plus years, I have heard a
multitude of scientific “reasons” that cause gold smudge. My wife
recently heard, on the radio, a discussion by an “expert” that stated,
after much study, it to be caused by a iron deficicency in the person
wearing the item, developing an “ionic” reaction to the alloys in the
metal. This supposedly explains why you can wear a piece for years
without incident, then suddenly develope the problem. A day or two
later, you may be able to wear the same piece without problem if your
body regulates itself with the iron-rich foods which it will crave.
Longer term problems can be corrected with iron supplements.
I have absolutely no other as to the credibility of the
speaker in this case, however maybe other more learned members of this
forum could shed some light
on the subject. JMF