What is oxidised silver jewellery?
By Jared James · Last updated 21 May 2026
Definition
Oxidised silver is sterling silver or fine silver that has been treated with a chemical, most commonly liver of sulphur or a dilute acid solution, to turn its surface dark grey to black. The effect mimics the natural ageing that silver undergoes over decades, but produces it quickly and with control. Jewellers typically use it to add contrast to textured or engraved pieces, darkening the recessed areas while the raised surfaces remain bright and polished. The blackening is a thin surface layer and can fade in exposed areas over time.
Frequently asked questions
- What chemical is used to oxidise silver?
- Liver of sulphur, which is a mix of potassium sulphide compounds, is the most traditional and widely used agent. Dilute hydrochloric acid solutions also work. Both are rinsed away completely once the desired darkness is achieved; it is the surface reaction they cause that creates the permanent colour, not the chemical itself remaining on the piece.
- Does oxidised silver tarnish further over time?
- The oxidised surface can continue to change slightly with wear, especially in areas that rub against skin or clothing, where it may lighten as the surface layer slowly wears away. This is not damage; many people enjoy the gradual evolution of the finish.
- Can you restore oxidised silver if the finish fades?
- Yes, a jeweller can re-apply the liver of sulphur treatment relatively easily to bring the dark finish back. Avoid using silver polishing cloths or dips on oxidised pieces, as these are designed to remove tarnish and will strip the darkening away.
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