There are four "C" principles in selecting diamonds: cut, color, clarity and carat weight.

incision

A good mine may be abandoned because the cutter's skills are not in place. The ideal diamond should be round, with 58 clear cut edges, which can reflect light to the greatest extent. A high-quality diamond has high value, strong reflectivity and good symmetry.

colour and lustre

In some big jewelry stores, some diamonds are displayed for comparison. They arrange diamonds of various color grades in a row to help customers compare, because ordinary customers can't tell the color of diamonds with the naked eye. The color of diamonds is colorless as the top grade, and gradually comes second with the deepening of yellow.

pure

Generally speaking, defects determine the value of diamonds. More precisely, it depends on the impurity content in the drilled ore. Almost every diamond contains impurities, even the best quality diamond will have some defects. When its cleanliness is LC level, it can be regarded as flawless level.

carat

Carat was once considered as the decisive criterion to measure the value of diamonds. When someone says that he bought a 2-carat diamond, people will find it unbelievable. In fact, the cut, color, purity and weight of a diamond are equally important to its value. The value of a 2-carat diamond with poor cutting technique, yellow color and defects is much lower than that of a perfectly cut, transparent and pure diamond. So the weight of a diamond is not the main factor that determines its value. The weight of a diamond still affects its value.