Gold ring...(yes it's real) cause Black smudges?
I have read that its because of the amount of tart in my body.
I'm not alergic
How do I lower that sour in my bod?
Answers: get through fewer large acid foods.
and it isn't the gold ingots, but the base metal it is combined near, for instance 14K gold is single 56% gold, the rest is remnant metal, like nickel or zinc.