1. Insufficient weight: The weight of jewelry may be deliberately underestimated to reduce the cost.

2. Misleading quality: The quality of jewelry may be misled, such as labeling low-quality gems as high-quality gems.

3. Fake and shoddy: Jewelry may be counterfeited, such as imitating famous brand jewelry with cheap materials or substitutes.

4. Misleading prices: Jewelry prices may be misled, such as selling high-priced jewelry at low prices.

5. Return and exchange: Merchants may have a return and exchange policy, but it may be difficult to actually implement it.

6. Certificate problem: Some merchants may not have authoritative certificates for jewelry, and these certificates can prove the authenticity and quality of jewelry.

7. Sales pressure: Sales staff may put pressure on you to buy without fully understanding the product.

When buying jewelry, you'd better do your homework, understand the quality, price, certificate and other related information of jewelry, and try to buy it from regular merchants. If possible, you can consult a professional or make an appraisal.

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