A 750 mark on jewelry means that the metal alloy used to make the jewellery contains 75 percent gold or another precious metal. Most precious metals used in jewelry are alloys because the addition of other metals improves hardness and durability. It also changes the color of the metal.Know More
Gold jewelry with the 750 hallmark consists of 18-karat or 18K gold and bears a European hallmark. In the karat system used in America, pure gold contains 24 karats of gold, so the whole comprises 24 parts.
Replacing six parts with alloy metals yields a purity level of 75 percent. Adding palladium or nickel to yellow gold creates white gold. Adding copper produces rose gold.Learn more about Jewelry & Watches
The "FB" stamp that is found on some jewelry is the initials of the designer Francois Borgel. The stamp is usually followed by a picture of a key.Full Answer >
On jewelry, "585" is a measure of gold's purity and indicates that the piece is made from 14-karat gold. This number is derived from the percentage of pure gold expressed as parts per 1,000. This system of certification is widely used in Europe.Full Answer >
The number 925 on jewelry shows how much sterling silver is present in the piece. The number describes the parts per thousand. This specific number is most often present on silver flatware, jewelry and tea sets.Full Answer >
A piece of jewelry marked with 925 means that it is 92.5 percent sterling silver and 7.5 percent of another metal. This mark is most often seen on sterling silver pieces, but it may be imprinted on gold jewelry.Full Answer >