Jade Terminology and Treatments Explained

Jade Type	Terminology	Definition
Natural Jade	"A" Jade or Type "A" Jade	Undergoes a traditional process, including plum juice washing for polishing marks and then soaking in wax for lubrication purposes. These procedures are internationally recognized as standard practice and are not defined as "artificial treatments"
Chemically bleached and polymer impregnated Jade	"B" Jade or Type "B" Jade	The jade has been chemically bleached to remove impurities and then impregnated with polymer to enhance translucency. This treatment damages the structure integrity of the jade.
Dyed form of "B" Jade	"C" Jade or Type "C" Jade	The jade has been dyed during polymer impregnation process. The structure of jade has been compromised, but the color is stable.
Dyed jade	"D" Jade	No polymers present, this form of dying predates the use of bleaching and polymer impregnation. The color is not always stable..

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Jade (Fred Ward Gem Book Series) by Fred Ward	Jade by Louis Zara	Jade by Fred Ward	Jades from China by Angus Forsyth	Jade by Roger Keverne (Editor)