Jade, gemstones and birthstones
Know the stone before you buy the jewelry.
How to tell real jade from dyed, filled or imitation stone, what a label has to disclose, the birthstone for every month, and how to buy online without getting fooled.
A, B or C: the three jade grades
A jade: Natural
Jadeite that's natural or polished with wax only.
B jade: Bleached and filled
Bleached with acid, then filled with polymer resin.
C jade: Dyed
Colored with dye.
Source: GIA FAQ, What is B jade?. GIA notes this system is used in China.
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