Home Ask Arthur Type C Jadeite Jade – Much Ado About Nothing

Type C Jadeite Jade – Much Ado About Nothing


Beautiful Icy Jadeite Jade Bangle

There are abundant articles on the internet on Type C Jadeite Jade which describes Jade as those which has been dyed and impregnated with polymer.

The definition of Type A Jadeite Jade and Type B Jadeite Jade have been covered in my past previous posts.

Just to recap, Type A Jadeite Jade is the natural jadeite jade which has not undergone any chemical treatment, apart from some cleansing in mild acid.  Wax polishing on the surface of the jade can still be considered as natural jade.

Type B Jadeite Jade has been chemically bleached to remove impurities and then impregnated with polymer.

From my point of view, Type C Jade is a triviality and is just much ado about nothing. Since some gemologists and jade specialists have hung a label onto it, it becomes an internet buzzword.  For the few jade dealers and jade connoisseurs, it is almost akin to the great discovery of this century on quantum mechanics and the Einstein’s Theory of Relativity for scientists researching particle physics. Maybe they thought it is some great break-through of the last frontier of knowledge on jade. Even some reputable gem labs have posted their findings on Type C Jadeite Jade as ‘dyed and polymer impregnated’.

Now take a look at this picture, which was previously posted:

The man is ‘painting’ some dyes on the surface of the jade.  Notice that all the jade bangles are still in its unpolished state so that dyes can easily seep into the minute capillary veins.  Then they are being ‘baked’ under pressure with a type of polymer as the solution.  The dye that is used is the same homogeneous polymer solution, except that these dyes are ‘colored’ while the solution polymer is colorless.

In all my years of experience in the jade trade, I have not seen a gem laboratory issuing a Type C Jade certificate or a jade report.   In Hong Kong, the practice of most gem labs is to issue a Jade Certificate for a Type A Jadeite Jade.  For Type B Jadeite Jade, only a report is issued with an FTIR chart.

For polymer impregnation into jade, the polymer used is commonly the Alkenes functional group, denoted by =C – H, with strong absorption from 3020 to 3100 cm-1. These can only be detected by the use of an equipment called the Fournier Transform InfraRed, which detects polymers in solutions and solids by Infrared Spectroscopy of Organic compounds.

Hence, there is actually no difference in Type B and Type C Jade.

Most Jade dealers, connoisseurs or jade lovers are only concerned about whether they have a Type A Jadeite Jade on hand.  Nobody gives a toss about Type B or Type C Jade.  Nobody bothers whether the type of polymers used for impregnation is the functional group of Alkenes, Alkanes or Alkynes. A fake is a fake is a fake.

I bought the above beautiful icy jade bangle for $1,500 from a known dealer. He swore that this was the Type A Jadeite Jade.   I thought I was going to score on this one.  It passed all the fundamental tests, or that was what I thought so.  The more I listened to the pitch, the more I liked it.  The more I ‘rubbed’ the jade, the more I felt that this was a Type A Jade.   Maybe the seller was hard on money, maybe he had a lot of debts, maybe his wife was going to give birth again, all these rationalizations crossed my mind on why did he wanted to sell that beautiful piece for this price.

When I came back to my lab to check, the icy bangle was Type B Jadeite Jade.  This was just another lemon I bought but unfortunately I could not even made lemonade out of it.

All I wanna do at that moment was to get hold of the seller and wringed his blady neck for selling me a fake.

You may have missed other posts of interest. To read them, please click on the picture

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I am a Graduate Gemologist trained at the Gemological Institute of America (GIA) in New York City, USA. I hold an MBA degree from Cranfield University, United Kingdom, and a Bachelor degree in Mathematics. My earlier profession was a banker until I found jade in Myanmar (Burma) in the early 90s. I have traveled to the fabled Hpakan Jade mines, and Mogok, the world’s famous rubies and sapphires mines in upper Burma, with my second son. Three of my children are also Graduate Gemologist, GIA, NYC and they deal in diamonds, gemstones and jade. 我是在美国纽约市的美国宝石学院(GIA)接受过培训的宝石研究学家。 我拥有英国克兰菲尔德大学的工商管理硕士学位和数学学士学位。我以前的职业是银行家,直到90年代初我在缅甸接触到玉石。我曾经和我的次子一起去过缅甸上流传说中的哈帕翡翠矿山和莫谷矿山, 莫谷矿山是世界上著名的红宝石和蓝宝石矿山。我的三个孩子都是纽约市GIA毕业的宝石研究学家, 他们专门处理钻石,宝石和玉石.


  1. Hi Alex

    Thank you so much for writing a commendable comment and taking your time to do so.

    I have answered your enquiry in one of the post.

    Thank you again for your support.

    have a good day

  2. Hi Arthur,

    I read with great interest on your article ‘Jadeite C – Much ado about nothing’. I am wondering why would you buy a fake piece of bangle for $1,500/- when your profession as a gemlogist couldn’t even tell a real A from a C type. Yes, I agreed with you and your article that mentioned the various way to tell a real from a fake. But with your years of experience, I am sure you could correctly guess a real from fake. An experience money changer will tell a real or fake currency by just feeling the texture of the note. Not a 100% correct but say 60%. I saw a similar C bangle in a store selling Jade. The storekeeper quoted me US$300/-. I was surprised at the low price for a piece of icy glass bangle. How could it be when another similar piece would cost US$50,000/-. But in the end, I didn’t buy it. There used to be a saying,”Good things not cheap. Cheap things no good.


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