Every so often someone opens a parcel from us, sees the black in the recesses of a ring and writes to ask whether the silver has tarnished on the way. It hasn't. That darkness was put there on purpose, by hand, and it took longer than the polishing did.
Oxidized silver is one of the oldest finishes in metalwork, and one of the least explained. Here is what it is, why carvers use it, how it differs from ordinary tarnish, and how to look after a piece that has it.
What "oxidized" actually means
The name is a little misleading. When silver goes dark, it is usually not reacting with oxygen but with sulphur. Traces of sulphur compounds in the air, in rubber, wool, some foods and even in skin react with the surface of the metal and form a very thin layer of silver sulphide, which is grey to black.
Left to itself, that process gives you tarnish: an uneven, dull film that creeps over everything. Done deliberately, it gives you a patina. Jewellers usually apply a sulphur solution (the traditional one is called liver of sulphur) to darken the whole piece. Then they polish the high points back to bright silver by hand, so the colour stays only where they want it.
So it is the same chemistry, but the result is very different. Tarnish happens to a piece. A patina is put there by the person who made it.
Why carvers darken their silver
Bright silver reflects light almost evenly from every surface. On a flat band that looks clean and modern. On a carved piece it flattens everything. A dragon's scales, the feathers of a wing or the strands of a beard all return the same glare, and from more than an arm's length away the carving disappears into shine.
Darken the low ground and the picture comes back. The recesses hold shadow and the raised edges catch the light, so the eye reads depth the way it reads a stone relief in raking sunlight. It is the same reason old engravers rubbed ink into their lines.
On our pieces we take the recesses almost to black and bring the high planes back by hand. That is also why graver marks are left where they fall. Combined with the darkened ground, they make a piece look carried and used rather than factory new. There is more about how this works alongside the gold in Traditional Fire-Gilding.
Patina or tarnish: how to tell
- Where the dark sits. A patina sits in the hollows and stops cleanly at the edges. Tarnish spreads over the raised surfaces too, often starting on the parts you touch least.
- The colour. A deliberate finish is usually a deep, even charcoal. Tarnish tends to go through stages, from pale gold to bronze, blue-grey and then black, and it is often patchy.
- The highlights. On an oxidized piece the high points are bright and crisp. On a tarnished one everything is dull.
Gold does not tarnish, so on a fire-gilded piece the gold areas will stay bright while the silver around them darkens. That contrast is part of the design.
How to look after oxidized silver
The rule is simple: clean the high points and leave the low ground alone.
Use a soft dry cloth. A plain microfibre cloth, or a silver polishing cloth used lightly on the raised surfaces only, is all most pieces need. Do not press it into the recesses.
Avoid silver dips. Liquid silver cleaners work by dissolving silver sulphide, and they cannot tell the patina you want from the tarnish you don't. A few seconds in a dip can strip the shading from a carving completely.
Go easy on polishing pastes and ultrasonic cleaners. Abrasive pastes will lift the finish wherever they reach, and ultrasonic baths are a risk for set stones such as turquoise, which is porous, and for anything with a hinge or a locket chamber.
Keep it away from chemicals. Chlorine in pools and hot tubs, bleach and some perfumes speed up uneven tarnishing. Put the piece on after perfume, not before, and take it off to swim, especially if it is set with natural stones.
Store it airtight. A small zip bag or a lined box, ideally with an anti-tarnish strip, slows the process down a great deal. Keep pieces apart so carved edges don't rub against each other.
Wear it. This sounds like a joke but it isn't. The friction of daily wear keeps the high points bright and leaves the recesses dark, which is exactly the balance a maker aims for. Silver kept in a drawer for a year usually looks worse than silver worn every day.
What if the patina wears or the silver goes too dark?
Both happen slowly, over years. A ring worn daily will lose some darkness on the parts that touch the most, and a piece left in a humid room can darken all over. Neither is damage. Any good silversmith can clean a piece and bring the contrast back. If it is one of ours, our care guide covers the details, and we clean, polish and check every piece free for life. You only pay the postage to us.
Where you will see it
Oxidized finishes matter most on deep carving. The Six-Tusked Elephant God Ring relies on it so the head reads as a head from across a table. The Taotie Double-Body Bangle uses it to separate the beast from its ground of fine spirals. And the Odin Necklace uses it to make the braids of the beard read as rope rather than a solid mass.
The short version: if the black sits neatly in the hollows and the edges are bright, leave it alone. It is meant to be there.