Are whiskey stones worth it?

Three of the top results for this question are published by companies that sell whiskey stones. That is the whole problem with the category in one sentence, and it is why this page exists.

Whisky Advocate tested the methods and asked Iskender Sahin, professor and associate chair of mechanical engineering at NYU Tandon School of Engineering, to explain what happens in the glass. Two mechanisms came out of it, and both of them work against stones.

Heat capacity. Heat capacity is the amount of energy it takes to raise a substance's temperature by one degree. Stone has a lower heat capacity than ice, which means a stone warms up much more readily than the same volume of ice does. A frozen stone dropped into whiskey gives up its cold quickly and then it is just a rock sitting in your drink.

Phase change. This is the bigger one. Turning ice from a solid into a liquid takes an enormous amount of energy, and while that change is happening the ice does not get warmer - it stays at its melting temperature and keeps pulling heat out of the drink. That is most of the work ice does, and stones have no equivalent to it whatsoever. There is no phase change available to a piece of granite at drinking temperatures.

The no-dilution claim is true. A stone adds nothing to the glass, so a whiskey chilled with stones stays exactly as strong and exactly as concentrated as it was poured. If you have a cask-strength bottle you want slightly cooler without opening it up with water, stones do that and ice cannot.

That is a real use case and it is not a small one. Plenty of people who drink whiskey neat find a room-temperature pour slightly hot and a splash of water an unwelcome change to the flavor. Stones solve that specific problem. They just do not solve the problem most buyers think they are solving.

• Someone who drinks whiskey neat and finds it a touch warm. This is the person stones were made for.
• Someone with a cask-strength or high-proof bottle who wants a temperature change without a dilution change.
• A gift buyer who does not know the recipient's taste well. Stones are inoffensive, cheap and present nicely, which makes them a low-risk present.
• Anyone who just likes the object. A heavy stone in a heavy glass is a pleasant piece of ritual, and enjoying that is a perfectly good reason to own them.

• Anyone who drinks whiskey on the rocks. You are giving them a worse version of something they already have in the freezer.
• Anyone who wants a genuinely cold drink. No stone material fixes this. Steel is marginally better than granite and still nowhere near ice.
• Anyone using them in a cocktail. An old fashioned needs both the chill and the small amount of dilution that ice provides. Stones give you neither.

If the real goal is cold whiskey, buy a large-format ice mold. A single big cube or sphere has a low surface area relative to its volume, which means it chills hard and melts slowly - the combination stones are marketed as delivering. Our ice mold picks start under ten dollars, which is less than most stone sets.

There is a nuance worth knowing here, from the same Whisky Advocate comparison: smaller ice actually chills fastest, because cooling is proportional to surface area. Crushed ice will get your whiskey coldest quickest. It will also dilute it quickest. The large cube is the compromise most people want, which is why it became the bar standard.

And if you have read all this and still want stones - which is a perfectly reasonable place to land - the good sets are here, and the gift formats are here.