white gold are true carat golds, just like yellow or red carat gold jewellery. They are gold alloys that look white rather than yellow. The white colour is achieved by careful choice of the alloying metals, which bleach the deep yellow of pure gold. It is interesting to note that white golds for jewellery were originally developed in the 1920's as a substitute for platinum. today, they are a jewellery metal in their own right and currently very fashionable and desirable, particularly among the generals. White golds are available up to 21 carat. They are often used to enhance diamonds and other gems. White gold bridal jewellery is increasingly popular.