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.Know More
Gold that is 14 karat is 58.3 percent pure. The figure is rounded up and expressed as parts per 1,000 giving 585 as the measurement. Gold that is 75 percent pure is described as 18-karat gold and is denoted as 750 in European hallmarking.
In the United States, the purity of gold is measured using the karat system. Pure gold is 24 karat, and this is the standard against which purity is measured. Gold that is 14 parts pure gold and 10 parts other metals is 14-karat gold.Learn More
The numbers 750 stamped on jewelry means that it is 18-karat gold. The jewelry piece is 18 parts pure gold and six parts metal alloy.Full Answer >
The abbreviation "DWT" in jewelry means "pennyweight." A pennyweight is a unit of mass equal to 24 grains, 0.05 troy ounce or 1.56 grams. Jewelers and gold buyers use pennyweights or grams to weigh gold and other precious metals.Full Answer >
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.Full Answer >
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 >