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 about Jewelry & Watches
The hallmark 375 means the jewelry piece is made of 9 karat gold. A hallmark on gold jewelry, such as the hallmark 375, is a symbol used to certify the purity of the gold. The mark also points to the manufacturer, the assay office that certified the gold and the year it was tested.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 >
To clean tarnished white gold, gather a bowl, mild dish soap, warm water, baking soda, a soft toothbrush, and a microfiber towel or jewelry polishing cloth. Soak the white gold item in soap and water, apply baking soda, rub the gold with a toothbrush, rinse the item, and then dry it. If the tarnish remains, use a professional jewelry cleanser.Full Answer >
White gold, especially in some jewelry pieces, may turn yellow over time when its rhodium plating gradually wears off. Rhodium plating is the preferred plating method used on most white gold rings because it is a pure white metal. This property of rhodium gives white gold jewelry a much whiter appearance and a more brilliant sheen.Full Answer >