Hehe, if these so-called indigenous methods can identify jade, then several major universities in China don't have to set up jewelry majors, and we don't have to study for so many years.
Now let's answer the landlord's question
Let's start with the certificate. The certificate says it's A goods, but it can't be said that all A goods are the same, and the prices are still very different. A goods refer to pure nature, except that the carving process has not been treated and improved, which is natural. Goods B are natural jadeite, which is soaked in strong acid to remove impurities and filled with epoxy resin; C goods are dyed jadeite; B+c glue filling dyeing.
Abc goods are not the grade of jadeite. Emerald, the same product, can be bought in 10 yuan, and some will be sold for millions. The evaluation of jade quality and price depends on the comprehensive measurement of variety, color, defects, workmanship and size.
Species, also known as water, refers to transparency.
Color, as the name implies, is color. Green is better in jadeite, but purple, yellow, red and blue are also good. With a good head, the price can be sold at a high price.
I don't think I need to say more about the remaining three aspects.
So even if they are all A goods, because of the above factors, there will still be good and bad points. Maybe you see the color transparency is similar, but if one is cracked and the other is not cracked, the price will be much worse.
The operating cost of shopping malls is higher than other places, and the price of the same thing will be different in small shops and shopping malls, which I think you can understand. Shopping malls also like to raise prices and then give high discounts.
However, the difference is 10 times. 1000 in the shopping mall is probably better than 100 you said. Moreover, for people who don't know much about jade, the reputation of shopping malls is there. He gives you a certificate, telling you that it is A goods, and there will be no problem.