TMARK is a sign of confidence given by Chow Tai Fook to customers, and it is also an important reason why customers choose Chow Tai Fook to buy diamonds with confidence. It clarifies the origin of diamonds, ensures that diamonds are mined responsibly and that the diamond production process meets the highest standards. Every refining stage of a beautiful diamond will become traceable information and be transmitted to the owner of the diamond openly and transparently.