Colorful Yunnan jadeite is still guaranteed. There are two flagships in Kunming and Beijing, Nantong, Kunshan, Qingdao, Jinan, Hangzhou, Ningbo, Erdos, Tangshan, Taiyuan and Xi 'an. There is also a direct operation in Vancouver Richmond, which is a leading enterprise in the jade industry in China.
Colorful Yunnan can become bigger and stronger because it realized that the tourism market in Yunnan was not standardized, shoddy and fake real jade, so the slogan "Only one piece of jade is sold in the store" was put forward and strictly implemented, which led to the colorful Yunnan now.
There are many colorful Yunnan jade advertisements on CCTV and Beijing Satellite TV. You should believe that you spend tens of millions of dollars on advertising every year, and you should not sell fake goods to smash your own brand.
Many profiteers also sell jadeite with certificates, but bullying consumers doesn't understand. As upstairs said, it is natural jade that means "jade A goods". Some certificates also say jadeite, but there are B goods and C goods behind them, all of which are treated jadeite and have no value.
As for the brightness you said, it is because of the soft polishing and water absorption of jadeite by human body. .
I'm too tired to write. If you want to know about soft polishing and adsorbed water, just call me.