You said you bought lottery gold, and the red you said has a nice name, rose gold. The so-called lottery gold is 18K gold, also called G750, which consists of 75% gold and 25% other precious metals. * * * There are three colors: K white, K yellow and rose gold. The color difference lies in the 25% added. Lottery gold mainly sells technology, so it is not recommended to buy it if you pursue preservation.