When many people buy gold in jewelry stores, they will mistake 3D hard gold for ordinary gold. Hard gold in jewelry stores is sold separately. A hard gold product is very large, 1000 is a little more. Many people think that 1000 is a good deal to buy such a large hard gold. However, after I bought it, I saw that it weighed only one gram. I can't return it or exchange it for other ordinary gold. I feel cheated. Generally speaking: hard gold cannot be exchanged for ordinary gold!