Diamonds is one of the best-known gemstones and have been well known to people and used as decorative items since ancient times. The quality of a diamond's cut is considered as the most important of the four Cs in determining the beauty of a diamond, it is commonly acknowledged that a well-cut diamond can appear to be of greater carat weight, and have clarity and color appear to be of better grade. In addition the cut is also the most difficult to quantitatively judge. A number of factors, including proportion, polish, and the relative angles of various facets, are determined by the quality of the cut that can truly affect the performance of a diamond. For a round brilliant cut, there is a balance between "brilliance" and "fire." If a diamond is cut for too much "fire," it looks like a cubic zirconia. A well-executed round brilliant cut should reflect light upwards and make the diamond appear white when viewed from the top. Diamonds do not show their beauty as rough stones instead they must be cut and polished to exhibit its brilliance. Diamonds are cut into a variety of shapes that are generally designed to accentuate these features. A kind of fancy cut which mean diamonds which are not cut into a round brilliant shape. The cut shape can be classified as princess cut, heart cut, a form of rose cut, and the cushion cut etc. Thus many fancy colored diamonds are now being cut according to these styles of cutting. The diamond ring is now popular presented as a betrothal gift by a man to his prospective spouse while he proposes marriage or directly after she accepts his marriage proposal. It represents a formal agreement to future marriage. Diamond can be purchase through the online channel of Wholesale diamond jewelry or wholesale custom made jewelry. Consumers who purchase diamonds jewelries are often advised to use the four Cs to identify the diamond that is right for them. Nowadays, a service of custom designed jewelry is founded and becomes an important business resources in the market, as people are going to more preferable of unique exquisite jewelry which can affected their personality, charm individual and characters. The appearance of synthetic gems on the market yet creates major concerns in the diamond trading business and as a result a special devices and techniques have been developed to distinguish synthetic and natural diamonds.