Does a 925 stamp always mean silver?

Excuse my ignorance, but I know nothing about metals!

I recently bought a brooch online, advertised as 'metal and enamel'. I assumed it was just a 'silver toned metal', but when it arrived, it has '925' stamped on the back. There are no other marks, stamps or signatures.

I always thought if it were stamped '925' then it was silver, but I'm surprised in this case, because the seller sells a lot of jewelry and would surely have listed it as silver if it were. I'm not bothered either way, since I love the brooch whatever it's made from. But I'm curious - if it doesn't mean silver in this case, what does it mean? Is it a model number?

Yes 925= 92.5% silver in my book. Saying that its not like gold. Silver is not worth very much as scrap £0.36 per gram where even 9ct gold is £12 per gram - so massive difference

Thank you for confirming - I guess the seller must have missed it. Nice win for me, since my max budget tends to be £6 and I rarely find silver items under that amount!

Thank you for explaining.

I often find that sellers will list the stamp but add that it isn't hallmarked. Or will say it is not hallmarked but has been 'tested' to be silver. And the price usually goes up accordingly! So I'm pleased this one didn't.