How to Make Sure You Are Buying a True Diamond

If you are going to buy diamond jewelry, there are a few easy tests you can apply without any special equipment. Though the 100 per cent of guarantee you can get only from certified gemologists specializing in jewelry. These rules rely on the way a real diamond stone conducts heat, refracts light and looks up-close.
Try to place the gem over printing, if it is loose. A diamond refracts so much light that they won't work as a magnifying glass and you will see no circles, letters or lines when crystal and glass will reveal the print clearly. You can also use a small light. If you shine the light through the gem and won't see it on the other side but will see a bright halo around the rim, this gem is more likely to be a real diamond.
A diamond is also good at conducting heat. You can breathe on the stone's surface and immediately check if the gem has fogged up. If it's a true diamond, you won't see any moisture when quartz, cubic zirconium and glass will stay hazy for a moment before the condensation dissipates.
A diamond has tiny bits of other minerals which got crushed into the diamond while it formed deep under the earth. So, looking at the facets, specks and ridges can give you a clue. If the gem looks pitted, rippled and if the facets have rounded or worn edges, it is likely to be glass.
The price is one more fact which can prevent you from buying the gem that will turn out to be something else than a diamond. It shouldn't be too inexpensive.
So, you can try to make sure you are buying true diamond jewelry yourself but it's better to consult with professional jeweler.