The black film on an unworn ring isn't failure — it's silver sulfide, the compound that forms when silver meets trace amounts of sulfur in the air. Sulfur is everywhere: in wool, in rubber bands, in the eggs you had for breakfast. Even the atmosphere carries enough of it to start the reaction.
This is why tarnish is uneven. The part of a chain that sat against your skin stays bright while the clasp behind your neck goes dark. Skin oils actually shield the metal; air attacks it.
What speeds it up
- Humidity — a jewelry box in a bathroom tarnishes three times faster
- Rubber and wool contact — both off-gas sulfur compounds
- A piece you never wear — skin contact slows tarnish more than a closed box does
What actually works
Mild soap, warm water, and a soft cloth handles most of it. For heavier tarnish, the baking-soda-and-foil trick isn't folklore — it's electrochemistry that pulls the sulfur off and leaves the silver behind. Save the aggressive dips for pieces with no stones; they strip a micro-layer of metal each time.
Tarnish on a piece you wear weekly is usually just a shadow at the recesses — which, on a hand-finished design with intentional matte areas, is arguably the look working as intended.
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