As long as consumers know the "international diamond quotation", they can know the real cost price of diamonds. International diamond quotation is the price basis provided by new york Diamond Exchange every Friday, which is used by jewelers, diamond dealers and diamond cutting factories all over the world for trading. This is the first time in the industry to disclose the bottom line of the diamond industry, so that consumers can understand the true value of diamonds.

However, the relevant person in charge of the Shanghai Diamond Exchange said that Shanghai Diamond Exchange owns many diamond companies. Shanghai Diamond Exchange does not quote according to the international diamond quotation, and there is no unified quotation on the exchange. The prices on the official website Stock Exchange are quoted by each company.