"China 925" y un símbolo están en el interior de un anillo de oro. (no puedo distinguir) . ¿Es oro real?? 
The symbol for Sterling Silver is 925 que representa 92 1/2% plata. I have seen many of these and most of the time it is silver. Don’t be fooled by gold plating on silver, a common product called Vermil. Usa un imán, if it picks up with a magnet, it is fake. If it doesn’t it’s probably silver and should be priced as silver. The gold plating has little to no value.
I found a silver ring on the floor, on the back of it it says 925 CN FZN . It has a square piece on the front with shiny small diamonds in it . How much is it worth?
Tal vez ? Nothing for resale, unless somebody likes it.
Diamonds are RARELY set in silver, unless they are very low grade. Especially mass produced rings from China. It’s a silver (925), ring made. En China ( CN), and the FZN is most likely the manufacturer. If you like it, wear it, or give it to someone else that would, but it isn’t worth the effort to sell it. Lo siento!
Who makes jewelry with Israel 925 stamped on the inside?
925” is the world-wide quality stamp for all sterling silver objects. It means that on a count of 1000 por peso), 925 parts are silver (one of the basic elements on the chart of elements), mientras que el resto 75 parts can be anything at all! Tradicionalmente (although not necessarily), sterling silver has 7.5% cobre (another basic element on the chart of elements). De este modo, sterling silver is any silver alloy (an ‘alloy’ being a mixed metal) cual es 92.5% plata.
en el reino unido, individuos (metalsmiths) cannot stamp their items with quality marks—they must be assayed and stamped by the authorities. But throughout most of the world, like in the US and in Israel, anyone can stamp their own merchandise. So if you find jewelry in Israel which is stamped 925, se supone que es plateado, pero puede que no lo sea si fue sellado de manera deshonesta. Es muy probable que las joyas compradas en joyerías de renombre sean de plata si están estampadas. 925. La tienda se metería en muchos problemas si se descubriera que estaban vendiendo joyas que no fueran de plata como si fueran de plata.. Las joyas compradas en mercados o bazares no pueden ser de plata aunque estén estampadas con ese sello.. Todo esto también es válido para el oro.. He visto artículos de “oro” comprados por cuidadores filipinos en la Ciudad Vieja (Jerusalén) estampado de 18K que no me parece oro en absoluto…..