Sterling silver chains on display a short time showing black marks

by Pauline
(Chicago IL/ USA)

Why are sterling chains showing black marks here and there(on display a short time)?

And why when cleaning with a steam or ultra sonic cleaner or even a good jewelers cloth they will not come off.

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Sterling silver chains on display a short time showing black marks

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Sterling Silver Tarnish and Cleaning It
by: Diana

Mostly the black marks are tarnish of some kind.

Sometimes this is done on purpose by the designer for effect, other times it's just the nature of the beast.

As to cleaning them I find that toothpaste and a hard bristle tooth brush works great for silver, and you can control what you are cleaning that way, as some stones don't take cleaner well like opals.