In terms of price, K gold is much cheaper. For diamond rings, platinum is the best material to quit. Precious and rare platinum is an excellent material to match diamonds. As for the need for gold to prevent diamonds from falling off, it is an excuse. As long as the process is up to standard and the design is reasonable, platinum is the best choice as inlay material. The problem of K-gold lies in its long-term discoloration. Of course, for some small broken diamonds with novel and elegant design, K gold is also a good choice.