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How to Clean a Gold Nugget and Care for It Safely

Gold doesn’t tarnish, but a nugget can still pick up dust, fingerprints or traces of soil. Lukewarm water, mild soap and a little patience are all it takes to bring back its shine.

Does a gold nugget need cleaning?

Gold is one of the most stable metals there is: it doesn’t rust or corrode, which is why a nugget keeps its colour for centuries. What it can do is get dirty on the surface – dust, fingerprints, skin oils, or sand and clay from the river it came from. Most of the time, an occasional gentle clean is all it needs.

Bear in mind that gold is a very soft metal. It scratches easily, and a natural nugget is valued as much for its shape and untouched surface as for its weight. Cleaning is not polishing: the aim is to remove dirt, not to change the look of the piece.

What you’ll need

• A small bowl of lukewarm water (never hot).
• A few drops of mild soap, such as washing-up liquid.
• A soft-bristled brush: a child’s toothbrush or a small paintbrush.
• A microfibre cloth or lint-free kitchen paper.

Step by step

1. Soak the nugget for a few minutes in the soapy water to loosen the dirt. Work over a bowl rather than the sink – a nugget weighing a few tenths of a gram can easily disappear down a plughole.

2. Brush gently into the hollows and folds without pressing hard. If the nugget has quartz or other rock attached, treat it with the same care: it’s part of the nugget’s story and shouldn’t be prised off.

3. Rinse in clean water so no soap is left behind.

4. Let it air-dry, or pat it lightly with the cloth instead of rubbing.

What never to do

• Acids and harsh chemicals: bleach, drain cleaner, strong jewellery cleaners or concentrated vinegar can damage the rock attached to the gold and leave marks.
• Heat: don’t boil it or hold it near a flame. Quartz and other included minerals can crack.
• Abrasives: toothpaste, scouring pads, wire brushes or polishes scratch the surface and strip away its natural look.
• Ultrasonic cleaners on nuggets with a quartz matrix: the vibrations can shake pieces of rock loose.

How to store it

The best clean is the one you never have to do. Keep the nugget in a clear capsule, a small glass vial or a collector’s box, and handle it by the edges or with plastic-tipped tweezers so you don’t leave oils behind. That way you can admire it under a loupe without touching it. If it’s a present, good presentation helps – see our ideas in giving a gold nugget as a gift.

A clean nugget is also easier to examine. To check its natural features, read how to tell if a gold nugget is real, and for a sense of what each weight looks like, our guide to gold nugget sizes and weights.

At Gold Nuggets Minerals we auction natural gold nuggets from Alaska, Australia and Lapland every week, each with its exact weight, its origin and macro photos so you can see its surface just as it is.