KTG is a member of National Futures Association (NFA), and its regulatory number in NFA is 0323769. As a registered dealer, KTG always maintains the highest standards, and its business activities are strictly supervised and managed by the federal financial policy and financial reporting system. The fineness of gold can be directly expressed by content percentage, usually expressed by the weight of gold divided by 1000 parts. For example, 99.99% is 9999 and 57% is 57. I don't know where you bought your necklace, but now a lot of gold is impure. Let me show you a report.