The seller, in this case, thought she had protected her buyers by selling certified gems in sealed packages direct from the GHI. That's the Gemological Hallmark International Co. Ltd. which happens to be located in Thailand. It is sealed, the information on the pack is dated April 30, 2010 with a report number. The deal is that there is a secret password underneath the flap with which you can access the full report at the website, if you have 50 years to figure out how to do that since they give no information at the site.
So here is the report on the back of the sealed packet.
Result: Natural Tourmaline
Object: One loose stone
Weight: 2.16 cts.
Measurement:8.79 x 8.43 mm x 4.69mm
Additional information on eBil says the origin is Namibia, the gem has had heat treatment, it's clarity is VS1 and it is jewellery grade.
Now have a good look at both gems. See how the top one sparkles all over but the bottom one has a blank look in the middle. It's blank and it's called a window. The cutters have gone for weight instead of cutting it smaller and removing that window. If you hold the gem straight and look down over a newspaper, you can actually read the print through this window. The 'Catch 22' here is that you can't see this unless you open the sealed package and once the sealed package is open, the gem is no longer certified. I could even read the fine print on the back of that package with this window and there was a lot of fine print.
When I emailed the seller, she was genuinely upset and offered me a full refund but I've kept the gem as it wasn't her fault. She then offered me a discount on any other gems I might buy from her, sorry nice person but not a chance. Anything from Thailand is suspect even with a certificate unfortunately Thailand was not mentioned anywhere on the report shown on with the stone on the eBil site or I might have taken a bit more care.
The next lesson will be on Laboratory grown diamonds.