What is anodising in jewellery?
By Jared James · Last updated 21 May 2026
Definition
Anodising is an electrochemical process where metal is submerged in an acid bath and an electrical current is passed through it, which thickens and controls the natural oxide layer on the metal's surface. That oxide layer can then be dyed in vivid, permanent colours, so anodised aluminium and titanium pieces can appear in blues, purples, greens and pinks without any paint or plating. The treated surface is harder and more corrosion-resistant than untreated metal, and the colour sits within the material rather than on top of it.
Frequently asked questions
- What metals can be anodised for jewellery?
- Aluminium and titanium are the most common in jewellery. Both form stable oxide layers that take colour well. Niobium is another popular choice for people with sensitive skin, as the anodised surface is hypoallergenic.
- Does anodised colour wear off?
- The colour is much more durable than paint or plating because it is embedded in the oxide layer rather than sitting on the surface. It can fade or scratch over many years of heavy use, but with normal wear anodised pieces hold their colour well.
- Is anodised jewellery safe for sensitive skin?
- Generally yes. Anodised titanium and niobium are among the most skin-friendly metals available, as the oxide layer seals the base metal away from contact with skin, making them a good choice for piercings and earrings.
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Tell us what you have in mind, even if it is only a budget and a piece of jewellery type, and we will help you weigh up the options. We reply to every enquiry, usually within one business day.
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