These diamonds are usually placed in a piece of jewelry so that it was possible to examine the stone behind. "The back side" should not be mirrored.
The real diamond can not be erased faces or rounded edges.
Original diamond, unlike forged not be jerky when approaching a magnet thereto.
Through a real diamond can not see the letters or numbers. And if a gemstone placed in newspapers or books, acts as a magnifying glass - that's for sure fake.
Carry on white paper straight line. Located on a true diamond it will distort the image.
This diamond does not let light through. Shine on precious stone lamp or torch, you can see only light areolas.
Diamond remains clear and transparent after it podyshat. What passes for a diamond (usually quartz, glass, etc.), clouded.
This diamond can not be warm in the palms. He is always cold.
On the surface there is a genuine diamond subtle inclusions of other minerals. However, this is not the bubbles - they are just fake stones.
Rub the stone with sandpaper, of which does not include the diamond grit. This paper does not leave traces on the diamond.
Place the gem under ultraviolet light. Most diamonds shine blue or blue light.
Check the stone X-ray. These diamonds are invisible to X-rays.
If you visit the "suspicious" diamond in the water, you will see the joint in the event that the gem is a combination of real and fake materials, which is also sometimes practiced.