2. Disadvantages: the price is higher: there are more diamonds in the Mantianxing necklace, and the quality of the diamonds is higher, so the price is relatively high, which may not be suitable for consumers with lower budgets. Difficult to maintain: There are many diamonds in the Mantianxing necklace, and the gap between diamonds is relatively small, so it is relatively difficult to maintain. Regular cleaning is required to prevent the accumulation of dust and stains. Easy to scratch: the diamond of the Mantianxing necklace is sharp, which is easy to scratch clothes or skin during wearing.