Abstract: Natural diamond is a kind of precious natural resources, known as the "king of gems In recent years, there has been a gradual increase in sales in the domestic diamond market with South Africa and other producing areas as gimmicks. This paper analyzes whether the origin can be used as the standard of diamond evaluation from the aspects of diamond distribution, production, processing, trade and evaluation. The results show that diamonds are widely distributed in the world, and the production and trade are highly concentrated. The origin is not the standard of diamond identification, and the advantages and disadvantages of diamonds cannot be judged simply by the origin. "4C" is the important standard to identify the advantages and disadvantages of diamonds. The purchase of diamonds should recognize GIA and other authoritative certificates.