Storm Glass-do they work?

[TwinklyNight]

I'm looking for Christmas stuff and thought my son (adult) may like this. But do they really work, has anybody ever had one? There are crystals in it that somehow coincide with weather. Never heard of them before. Was on amazon.

Nope. A gimmick more than anything. It's just a super saturated solution of an ammonium salt and crystal will grow depending on the temperature.

But it can easily be affected by positioning in the house, air conditioning, fans, etc. I mean- obviously if it gets colder or hotter in the house, you'll get varying crystal sizes.

Watch the news if you want to get the weather forecast.

But it is pretty.

No but they are pretty.

The crystals increase when it's colder but mostly it stays pretty much the same regardless of the weather. I still like mine though.

Have you considered a Galileo thermometer at all? They are very nice and do actually accurately change according to the temperature.

If you're after something to forecast the weather I can highly recommend a weather stone, 100% accurate

I got one for my inlaws a few years ago. It is the same today as it was when I gave it to them! But, as others have said, it's a pretty item.

If I had one I'd feel obliged to try cooling it really slowly to see how big a crystal I could grow.

I bought one a few years ago and have never seen a change.

What about one of the temperature things they do wirk

Thank-you everybody. Not especially looking for weather related things, it caught my eye while searching.
Thanks for your time!

I Have one and it changes on a daily basis, not entirely sure it's accurate as the descriptions in the instructions are quite vague but it looks pretty and does change all the time.

I ended up getting a train/waterglobe for his stocking, and the storm glass for under the tree.