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What tool can check Jades


#1

Do you guys know any tool can check jades? I am going to purchase some jades, but am told that there are many fake jades in the market. I am scared, do you know what tool can tell whether a jade is real or fake?


#2

How to Tell Ancient Jades from the Fake
All ancient beautiful stones are called “Ancient Jade” nowadays. They have fine texture, beautiful colors and moist, clean surfaces. In winter, they do not have a cold feel; in summer, they are cool. Thanks to these characteristics, ancient jades are popular all the time.
Now, with the development of technology, many so-called ancient jade are not real jade, but fake stones. So, to those who love jades, skills to tell real jade from fake ones are necessary. Here, this article will share you some tips.
1.Jade color distribution: The color distribution on the fake jades is not natural; there is no transition layer between different colors, because modern methods cannot make the colors on the surface or inside the jades look natural.
2 Fractures. The holes, spots and fractures on the ancient jades are all corrupted by nature, therefore, they feel natural and not sharp. But the one the fake jades, since the holes, spots and fractures are man-made, they may look sharp and feel prickly, difficult to handle.
3.Material: Fake jades apply relatively worse jades with many fractures, whose colors look ancient, and more a stone than a jade. Since their texture and color are not pure, the texture feel rough, and color is dim. Such kind of jades look like the ancient jades that are just excavated from the earth, so they are much deceptive .
4. Color. Fake jades’ colors are added to the surface, so, they are not so natural as the ancient jade, either too bright or too dim. In addition, as the color are added to the surface, it is easy to fade due to the dyes are difficult to stick to the stone. If you immerse the fake jade to water, you may see color fading over time.
The four methods above are enough for the experts, but to the common jade collectors and lovers, it may be a little difficult to tell jades based on these four methods But do not worry, Tank007 jade expert flashlight can help you. With the help of this jade expert flashlight, you can clear see the texture of the jades, material, etc. to tell real ancient jade from fake ones.


#3

Usually, we use UV flashlights to check jades. brands like inova, LED-lenser and tank007.


#4

The definitive answer is the Infra-red Spectrometer. Quoting from the Mason-Kay website: http://www.masonkay.com/jade/whatisbjade.php

“In 1990 the Gemological Institute of America developed
a technique that definitively, and in a non-destructive manner,
can test for the presence of polymers within a jade’s interior:
infra-red spectroscopy. Polymers leave a tell-tale trace in the
infra-red spectrum. A machine called an infra-red spectrometer
can detect this trace quite clearly. Mason-Kay is currently
the only commercial firm in the United States equipped with
its own infra-red spectrometer since 1995. Mason-Kay is well
known for its testing and evaluation services to the jewelry industry.”


#5

Hi you can use a spectroscope to identify Jade but you really need to know what you are looking at see attached for green jade

https://gemsociety.org/wp-content/uploads/2015/07/Jadeite.docx


#6

Those little hand held spectroscopes don’t use enough excitation energy in the visible band to trigger Stokes or Raman Scatter, so those are a waste of time. The correct instrument is a Mid-Band Infra-Red Spectrometer. The heat from the internal excitation source is the correct frequency range to excite the bonds of the molecules so you can detect the polymer plastics and/or dyes in the stone. It is time for the Gemology Schools to start teaching the Chemistry, Physics, and REAL Spectroscopy needed to keep up with all the advances in material science and nano-technology we are seeing now. Real Gemologists have to step up their skills.


#7

Very true, however try using a infra-red spectrometer in the field or any other hi-tech lab equipment either in Thailand or Burma when you are buying cut or rough gemstone or jade pieces with a dozen or so people shoving stone at you,. subsequently the trusty hand held spectroscope comes in very handy in this situation along with a few other hand held instruments.


#8

I have been to Thailand many times and it is getting pretty modern there. There are quite a few labs open for testing … even a GIA in Bangkok. There are also portable IR Spectrometers now available. The hand held spectroscopes do not provide enough sensitivity or resolution to detect the polymers. The UV lights can sometimes excite the dyes where they can be detected with the human eye as the detector. Jadeite is simply one of those stones that you have to be extremely careful with or you will get burned. If you are fortunate enough to see the material being mined in the field, then you have something going for you. Of course you can always use the Thai way to detect “good jade” buy lighting the match or lighter with a human hair across the face of the stone!! (If “good jade” then the hair does not burn and melt). LOL (Sometimes it does work as the heat from the lighter (infra red energy) gets absorbed by the stone and the hair does not burn!) Have one of your Thai friends show you that technique. It’s pretty interesting to watch. Kind of like testing AA and AAA batteries by bouncing them on a hard surface instead of using a voltmeter. :))))


#9

Thanks I take your point, as a matter of fact I am back to Thailand in Feb on a gem tour with friends and a good mate who runs the tours, Will kick off from Bangkok and fly to Mae Sot stay there for 2 nights and then mini bus from Mae Sot to Chiang Mai. 2 nights in Chiang Mai and then fly back to Bangkok. Next day visit a few gem dealers in Bangkok and Russgems. next day travel from Bangkok to Chanthaburi 3 nights there and looking at gem buying etc.
also travel to gem treaters including the ruby glass fill process.
back to Bangkok after a few days R and R at Kho Chang.

by the way if any one is interested he is also planning a Thailand and Myanmar gem tour later in April May 2017. this will include 3 mines in Mogok if as well as visiting gem markets and jade market in Mandalay
I can give contact details if anyone is interested.