Silver, Copper and Brass: How Those Metals Are Worked

Gold is not the only metal in an Indian shop. Silver vessels, copper pots, brass lamps and thin fashion jewellery use three different materials. They are often spoken of as if they were one “metal gift”. They behave differently under the hammer and on the skin.

Silver

Sterling silver is an alloy, commonly 92.5 percent silver, with copper making up most of the rest. The stamp 925 means that proportion. Fine silver, purer and softer, is less usual for a piece that must hold a shape. A silver article can be raised from sheet, drawn as wire, or cast. Casting pours molten metal into a mould. It suits repeated small forms. Raising, hammering a sheet over a stake, suits bowls and cuffs.

Silver tarnishes. A dark film is silver sulphide, from sulphur in air, wool, and some foods. It is not dirt in the sense of dust. A polish removes a whisper of metal with the film. Polishing every day wears a thin piece down. Store silver dry, away from rubber bands, which carry sulphur. A lacquered piece should not be scoured. The lacquer is a clear coat. Once it cracks, tarnish starts at the crack.

Silver is not hypoallergenic for every person. The copper in sterling, or a nickel alloy in a white plating, can bother a skin that pure silver would not. If a wearer’s skin reacts, the alloy and the plating are the first questions, not a curse on the design.

Copper

Copper is a single element. In the workshop it is sheet and wire, softened by heat, formed, and cooled. It takes a hammer well. It also stains. Moisture and acids turn the surface brown, then, over a long time outdoors, green. A green spot on the skin from a copper bangle is a surface reaction. It is common. It is not proof that the body needed copper, and it is not proof of harm by itself. People with a known metal allergy should treat it as a metal, not as a remedy.

Lined copper vessels, when the lining is tin, are a different object from a bare decorative pot. Food use depends on the lining and on how the pot is kept. A jewellery page should not double as cooking advice. If a piece is only for the shelf or the wrist, say so.

Brass

Brass is copper plus zinc. It is not bronze, which is copper plus tin, though shops and customers mix the words. The proportion of zinc changes the colour, from a redder metal to a paler yellow. Brass casts cleanly, which is why bells, lamps and small figures have been made from it for a long time. It tarnishes to a darker gold and can be polished back.

A brass article described as “antique gold” may be brass with a colour, not gold of any carat. The bill should say brass if it is brass. A gold wash is a thin coat. It will wear on the high points of a handle or a ring.

Marks worth reading

A useful bill names the metal: sterling silver, silver of another fineness, copper, brass, or a mix. It names any stones. It does not need a legend. Weight matters more for silver and gold, which are priced by the gram, than for a small brass gift, which is often priced as an object. Ask which way the price was built.

These metals are the daily work of a workshop, not a lesser afterthought. They deserve the same plain words as gold: what it is, how it was finished, and what will happen to the surface after a year of air.