22/09/2026
Half a tube of silver goes in a drawer. Four years later it comes out looking blotchy, and the owner assumes the money has gone with it.
Usually it has not. The Royal Mint publishes the answer itself. Of milk spotting it says it "doesn't devalue your coin as it is predominantly desired for its precious metal count". It is a surface effect linked to the annealing process used in striking, not corrosion, and the ounce underneath is unchanged.
What does cost you is trying to fix it. Removing a spot cannot add a single milligram of silver, and it can leave hairlines across a mint finish that any buyer reads as damage. We would rather buy a spotted coin than a polished one, and we will say so when you ask.
Our new guide goes through what a buyer actually checks on silver and in what order, why an intact twenty-five-coin tube is one item to verify while the same coins loose are twenty-five, what a dealer looks at on a bar before reaching for the scales, and the one difference between a silver Britannia and an American Silver Eagle that has nothing to do with the silver in them.
https://yardmint.com/blogs/insights/sell-silver-uk?utm_source=facebook&utm_medium=social&utm_campaign=sell-silver-uk&utm_content=facebook_photo