Qanday qilib haqiqatni ayta olasiz 925 sof kumush?
Qachonki kumush bo‘lakda o‘sha muhr bo‘lsa, Bu shuni anglatadiki, ishlab chiqaruvchi tayyor bo'lakni yoki butlovchi qismlarni siz uchun har bir bo'lakka muhr qo'yishdan oldin uning haqiqiy sterling ekanligiga ishonch hosil qilish uchun metallni tahlil qiladigan markalash xizmatiga yuborgan. - or I believe larger-scale producers with trusted materials can buy their own stamp for a LOT of money. So if the piece was made in a place like the UK or the US, you’re probably pretty safe.
Buni aytib, forged stamps can be used by less trustworthy suppliers like a lot of those discount Chinese sellers so in that case it is worth being cautious. Calculating the density is complicated because you can’t compare it directly to the density of elemental silver, due to the other components of the alloy.
The best ways to be sure are to leave it to tarnish - this happens naturally over a few weeks, but you can speed it up either by keeping it somewhere warm and humid or by putting it in a ziplock back with a couple of boiled egg yolks. If the silver turns blue-black on the surface, you know it’s at least silver plated.
Bundan tashqari, it’s difficult to confirm for certain without somehow damaging the item, so you might want to take it to your favourite local jeweller for confirmation. They might even be able to tell you just from looking at the piece. A well-trained eye can simply spot silver; it has a subtle but definitive shade compared to other silver metals like white gold, zinc-based alloys etc.