I’ve read your posts and others from many websites about type A, B, C jade. Once I came across a web that mentioned the type of treatment called B+C, which was explained as the worst jade that received all heat treatment, bleaching, and added color.
Is there such a term ‘B+C’ in jade industry? Is this pendant an example of type ‘B+C’ jade? This pendant doesn’t belong to me. I found it online and brought it here for a discussion only. I can see there is some sort of ‘icy’ texture on the back and something like ‘calcification’ in the front but no other black inclusion. Plus, the carving is primitive. If it is not old style, then it must be a product of low quality, mass-produced jade.
Viet Walin from the Deep South.
Hello Viet Walin
Type B+C Jade is only a trade term which is described as being bleached, dyed and polymer-impregnated by a number of websites and even some gemlabs in Hong Kong and other countries. The identification is only by sight and it has never been established that there are 2 different types of compound of dye and polymer as present within the jade piece.
I would say that to hang a label with a name onto a jade piece without any empirical proof is wrong. A gemlab can only detect the presence of polymer but a gemlab or anybody in the jade trade will never go further than that, that is, to analyse the content of the polymer and the so-called dye within the jade. It is not practical and no one will spend time analyzing an enhanced jade which has no value, unless a person is in the trade of making Type B jade.
It is only logical that only one type of polymer is used for impregnation. A polymer can be colorless as well as colored. Using two compounds which are not homogenous for impregnation will have complication of absorption into the jade piece. Further, when 2 compounds are used, there will be very clear demarcation of color separation and it can be easily seen by the naked eye that foreign elements have been added onto the jade. The purpose of polymer impregnation is to enhance the jade to make it more pleasing and at the same time not to have any visible tell-tale signs.
Calcification of a jade refers to leaching of its color when a jade piece is being buried under the ground of a long time. On the picture, there is no calcification at all.
The jade piece is also not considered as glassy. A glassy jade is semi-transparent and almost look like glass whereas semi-translucent is more common.
The jade piece as in the picture is easily available in Hong Kong and China at a cost of less than 2 quarters a piece.
There is a purpose by seller/s on the use of the term Type B+C jade. I will write about it sometime in the future.
A Arthur Lau