A green or grey mark on the skin
A faint green line under a ring, no itching, washes off with soap. This is oxidation: the small amount of copper that every silver and gold alloy needs for strength reacts with acidic skin, sweat, soap film or hand cream, and the residue tints the skin. It happens with fine jewelry, costs nothing and harms nothing.
- Comes and goes with the weather, hormones, stress and what you put on your hands.
- More likely on humid days, after sport, and under a ring worn 24/7.
- Not a sign of poor quality — 925 silver is 92.5 % silver and 7.5 % copper by definition.
What to do: wash the finger, dry the ring, keep creams off it. The habits in our care guide stop it almost entirely.