Gold jewelry sold by the gram is full of gold content, while jewelry sold by the piece is generally low in gold content. From the merchant's point of view, the profit of gold jewelry sold by gram is very low, which is generally used by jewelry stores to attract customers, mainly earning some manual fees. However, gold jewelry sold by piece is different. Some jewelry is even more expensive than pure gold, so there is a lot of profit space. This kind of jewelry mainly wins the attention of consumers with its unique style. Gold jewelry bought by the gram is very easy to check the purity, and the price is high when it is recycled, while gold jewelry sold by the piece is not so easy to handle. Therefore, from the perspective of jewelry recycling and gold purity, it is definitely more cost-effective to buy by gram.