Most of my jade come form Zhong Gong Germ Testing Centre. It is a national lab in China.
I use one regular bangle in my store and the certificate from Zhong Gong Germ Testing Centre as an example.
This one:
Here is the certifcate:
Front
Back:
There are two way to verify it.
1, scan the code.
Here is the QR code:
Open the built-in camera app while your phone connected to wifi. Point the camera at the QR code. Tap the banner that appears on your phone.
This will bring you to the website of the certificate.
https://www.zbtesting.com/Api?u=dw.m.P2311008375
2. Check it on the website manually.
Go to the website on the back of the certifcate.
http://www.gtc168.com
Put the number on certifcate for the checking. It will show the checking result.
Occasionally, I have certificate from other institutions. For example, this one.
Scan its QR code will also bring you to the website.
http://www.gdzhengjian.com/mc-plugin.html?pluginid=loclog&ordernum=GR190587018&keys=33.41
Or you can check it manually.
Go to the website which listed on the back of the cerfifcate.
Put the number as my photo shows
You will have your result
http://www.gdzhengjian.com/mc-plugin.html?pluginid=loclog&ordernum=GR190587018&keys=33.41
If you can't verify the certificate from my store. Most likely the number you fill in the blank are wrong. Please contact me. I will glad to help.
Thanks for your time.
Update!
Important notice! The scan code of some certificates won't work due to the website upgrade. But Still can verified it manually.
Please check this link:
https://allaboutjadecanada.myshopify.com/blogs/news/important-notice-the-scan-code-of-some-certificates-wont-work-due-to-the-website-upgrade-but-still-can-verified-it-manually