42coin is the virtual currency in the world of diamonds, so, I think the logo should use this: Beijing Olympic Games gold medal (Gold inlaid with jade), representing the 42coin is the virtual currency in the champions; 42 diamonds represent every 42 coin is a diamond's value.
The design of the logo used the Beijing Olympic Games gold medal pattern(Gold inlaid with jade), representing the 42 coins is the virtual currency in the No.1, 42 diamonds represent every 42 coin is a diamond's value. I hope you will enjoy them.