First, determine your budget and how many diamond rings you want to buy. In foreign countries, it is usually three months' personal salary as the budget.
Secondly, it depends on whether you choose to buy in a brand store or a physical store.
If you choose to buy in a brand store, then I recommend Zhou Shengsheng, Lao Fengxiang and Ai Jewelry if it is cost-effective.
If you choose online shopping, the cost performance will be higher. After all, the cost of opening stores in some physical stores will be saved. Relatively speaking, the parameters of the diamond you buy will be higher under the same budget.
Finally, let me talk about the price of this configuration you mentioned: the latest international quotation for diamonds with 30 cents, H color, VVS2 and medium cut is around 4500. Plus an exit of 1000-2000, the total is about 6500 yuan.
If there is anything else you want to consult, please ask. The above prices are for reference only.