how can i know if the stone i have is real diamond or not?

Answer 1

Take it to a jewler and they will tell you at no price!

Answer 2

This is not an absolute test, but its quick and simple, so you can use it as the first step...
SOME diamonds fluoresce. So put it under a black light (UV light). If it fluoresces (looks anywhere from light blue to dark blue), then you know it is real. Not all diamonds fluoresces, however, so just because it does not, it doesn't mean it is fake. You would need to use some other method. Apparently, *very* high quality diamonds do not floresce (my engagement ring flouresces... oh well.)

Cubic zirconia or glass will not fluoresce under UV light.

Don't try to scratch glass with it! Diamonds resist scratches themselves, but they can certainly chip. And lots of things can scratch glass. You can scratch glass with a steel nail, or even another glass.

Answer 3

You can tell whether or not a stone is a real diamond or not by measuring its density. Every substance has a specific density. So, if the densities do not match, the stone is not a real diamond.

The simplest way to tell what the stone is is by scratching it.

Answer 4

If the diamond is to perfect, then I would be suspect. Look at it under magnification; most diamonds will have some imperfections; like dark specks. It is acceptable not to have the best; you just get what you pay for.

Answer 5

The best way, sort of testing for hardness, is to establish its density and index of refraction. Diamond has an index of refraction at 2.417, higher than the compounds usually used to make fake diamond.

Answer 6

See if it will scratch glass. A real diamond will.

Answer 7

take it to a jeweler who has the electronic resistance tester....this is the only way i know of to be sure....except for density measurements which you probably don't have the equipment for measuring

Answer 8

Take it to a jeweler.