24K gold is pure gold in its refined state. It is soft, flexible, and even delicate. 22K and 21K gold is made of 91% and 87% pure gold respectively. These karatages are particularly prevalent in India and the Middle East. 18K gold has become an international standard for jewelry, containing 75% pure gold. Combining purity with performance, 18K gold has, for example, been adopted as the karatage of choice for the world’s leading watch brands. In addition, this is the karatage at which gold can magically begin to change color as other metals are added to the alloy (such as the increasingly popular rose gold hues).
It is possible to make gold jewelry below 18K. In the United States, 14K is sold widespread, but it is extremely rare for TIVOL to sell jewelry made of anything less than 18K gold. One of the great qualities of gold is its malleability. This, combined with its physical beauty and resistance to corrosion, makes gold the ultimate creative medium. Pure gold can be considered too soft and delicate for use in jewelry, so it is often combined with other metals for greater strength.