Think of Audrey Hepburn or Marilyn Monroe, they are natural beauty. If they are jade, they are definitely class A, all natural.
As for who would I describe as class B jade, hope I do not offend anyone with this, Sharon Osbourne. She looks great for her age but her expressions are limited, was it Botox? B class jade are usually dyed or filled with chemicals.
Now, Class C is interesting. They are usually other materials passing off as jade, can be glass or other stones. Imagine your best mate going to Bangkok, return later as a lady boy?
I hope that with these examples, you would have a better understanding of the different classes of Jade.
Faith’s Treasures 