Carat is the weight unit of diamond, which is equal to 0.2 gram. In the diamond industry, the value of a diamond is directly proportional to its weight. Therefore, carat has become one of the standards to measure the value of diamonds. Diamonds with 1 carat are usually slightly different from diamonds smaller than 1 carat, because they are different in aesthetics and intrinsic quality.

Besides diamonds, carats can also be used to measure the weight of other precious stones, such as rubies, emeralds and sapphires. In the jewelry market, carat has become one of the standards to measure the value of jewelry. The higher the number of carats, the higher the value of jewelry, because high carats mean that gems are bigger, rarer and more beautiful.

Although carat has become one of the standards in the jewelry industry, other factors such as color, cutting and purity will also have an impact on the value of jewelry. For example, if a 4-carat diamond has obvious pigments or inclusions, its value may be lower than that of a 2-carat high-quality diamond. Therefore, when buying gems, we need to pay attention to judge and understand their comprehensive value.