No they do not have to be, but when it comes to selling, the buyer would have no guarantee as to the purity of the gold bar and therefore no idea of what price to pay. The gold bar would need to be 'assayed' in order to determine its purity and content. This is a time-consuming activity and makes selling your gold bar a slower and trickier process.
The point about stamped gold bars is that they authenticate the content, weight and purity of the gold bullion. Certain refineries around the world are recognised by the world's main bullion exchanges making buying and selling their gold bars a much more smoother and trusted process.
Credit Suisse gold bars for example are manufactured by Valcambi whose assayer stamp CHI Essayeur Fondeur decorates every bar. These bars are therefore popular with investors as they are easy to buy and sell. The stamp is globally recognised and assures the buyer and seller of authenticity.
No. Only sterling gets stamped sterling. Gold is stamped gold. If you have an item that looks gold but has a sterling stamp you have sterling with gold bonded on top of it.
I have a gold necklace stamped 926 italy, is this real gold or silver?
No. That means that it is 92.5% sterling silver. It's not gold.
The 925 is an indication of sterling silver, not gold.
no -- 925 refers to sterling silver NOT gold
925 is the mark for sterling silver, which is 92.5% silver. The BX is probably the manufacturer's mark. The gold jewelry is gold-plated sterling silver.
825 is not gold 825 is probably 925 meaning sterling silver blurred or miss stamped
925 is a standard marking for Sterling Silver, thus making it a silver ring, not gold.
It is important to know the value of owned jewelry. China 925 stamped on gold means it is sterling silver, with a gold plating or gold wash.
If it is sterling it is usually stamped as sterling
There are two reasons a ring could be stamped with 14k and 925 1) The ring is made from both 14k gold and Sterling Silver (925). 2) The ring is made from Vermeil which can be made from 14k gold thickly plated over Sterling Silver.
Though gold can be stamped anything, in theory, that is silver. Most manufactured silver in the western world, and increasingly in the world is sterling. Many times it is marked as it's purity of 92.5% or .925. Gold manufacturers will avoid using 925 as not to confuse people
it means that the ring/bracelet is gold plated sterling silver.