This is a 18K diamond ring. AU750 refers to gold with a gold content of 75%, and white is because it is mixed with 25% other metals. D0.048CT is the weight of diamond, and 0.048 carat is very small and worthless. The manufacturing cost of this ring is only 1000 yuan, and the market price is about 2000 yuan. Of course, some jewelry stores sell more expensive. Diamond ring merchants have appraisal certificates. Do you? However, spending 3,000 yuan is too expensive for you. This kind of ring can be bought at the pawnshop for a few hundred dollars at most. I hope to give you a reference to avoid this situation in the future.