Gold is a precious metal and diamonds are equally precious too. Therefore, it is a responsibility of a jeweler to take care of both metal and diamonds while making diamond jewelry. Gold in its pure form is not strong enough to stud diamonds into it. It does not make jewelry durable or long lasting. In order to increase durability of jewelry, other alloys or metals have to be mixed, to make gold stronger. Hence 18 kt or 14 kt gold is used most of the time to make diamond jewelry.