Hey Banga and Giana,
Here are some tips and photos which might be useful for you guys.
There are over 20 different kinds of Ruby. If you check a real ruby with lamp, you can see the white spot or white ray( which is also called silk). You can also check it with 10x lens. And some real ruby has bubble in it. an artificial ruby also has bubble in it but the bubble inside is definite circle. Real ruby bubble can be oval or other shape. If the bubble is look like definite circle, it is not real ruby. And there's also a liquor which can test ruby is real or not. But not so easy to find it in Myanmar. Better buy that liquor in oversea. Sorry I don't know how to call it in English. If you put a ruby in that liquid, a real ruby will sink until the bottom, for Spinal Ruby ( low quality Ruby) will be stay in the middle of liquid and for artificial one it will float over the liquid.
Here I attached some Spinal Ruby.
You can test ruby at laboratory but there are some artificial ruby which cannot be clarify easily at laboratory. It made up with French glass inside and stick with ruby powder ( powder of low quality ruby) on the surface of it. You can check it with ultra violent rays.
Photo of Peridot.
Photo of Sapphire.
Photo of Cat eyes(Moon Stone)
Photo of Quartz.
For that Quartz gem, it was white color originally. But people colored it by laser rays and chemical. So color will stay forever like this.
For Judge, I don't know exactly about it. If you check it with lamp, there some rays inside of it.
Buying gems stone is not so easy to handle. Because even the expert can be chatted sometimes, for buying Judge especially. You better learn the facts and market of gems stone before you buy a precious one.
Hope this is helps anyway.