750 means that your piece is 18-karat gold or 75% purity. It has a relatively high purity and is much more durable than greater karat varieties. It looks elegant and does not easily dent. 18-karat gold is also perfect for wearers who have allergic reactions to lower purity gold jewelry pieces. You can usually find 18-karat gold in simple designs such as wedding rings. They are less likely to be prone to damages than other intricate designs. But although it is durable, it does not have the same shine that the greater karat varieties have. Like the 585 gold, the 750 gold also comes in different colors: yellow, white, and rose. Yellow gold It is the most popular because it is the shade that appears more like gold. It is a combination of gold, and other noble metals, such as silver and zinc. It is tarnish-resistant and is highly hypoallergenic. White gold White gold is a combination of gold and other metals, such as silver and platinum, and palladium. Some manufacturers also add a little amount of nickel and zinc. Rose gold This variation of an 18-karat gold gets its reddish tint from its copper component. It is a more affordable option because of its cheaper element, copper.