Huh? Swarovski is a handicraft, and none of its shops are real crystals, which are extremely expensive ~ I know Cartier is the most famous one, and there is an exhibition in the Forbidden City in Beijing recently, as well as Tiffany's diamond ring made of silver ... but I may not be able to afford it all my life, so I don't know much. Diamonds are graded strictly, so don't worry about the brand. If you want to see it, Belgian cutting is the best in the world. The production of Japanese akoya pearls is strictly controlled, so they are very beautiful and expensive. A necklace is not less than 3000 yuan. I think the pearls in Beihai are quite good. Good pearls are round and shiny and cheap ~ but the best pearls are black pearls in Tahiti and Nanyang pearls (platinum and gold). A good necklace costs tens of thousands, and a good one costs 1000 yuan ~ don't compare with diamond pearls, I personally think. A good diamond of 1 carat costs 50,000 yuan, but its value will be preserved after 20 cents (1 carat = 100 cents). Moreover, diamonds are monopolized by mining, and the supply exceeds demand in the market, that is, buying expensive, selling cheap and speculating. If it is rare, the golden green cat's eye and alexandrite are much harder. They are produced in Sri Lanka in the world and are basically sold in the market. Good emeralds are more expensive and rare than diamonds, as well as pigeon blood-red rubies and cornflower sapphires, which are very rare and extremely expensive ~