how do you tell if a diamond is real?

Answer 1

See-through Test:
Is just what it says, if you can see through a diamond when looking at it face up, it’s most likely fake (a poor cut or dirty diamond can also be seen through). This test also works upside down on a newspaper with round diamonds. If you can read the print, you should probably consider an alternate choice. Don’t, however, pass on an antique stone just because you can see through it. Cuts have changed over the years, and some heirloom diamonds were cut with a large culet to encourage the see through effect.

Closed-back Test:
When shopping for mounted stones, be on the
lookout for any setting that hides the pavilion from view. Most real diamonds are mounted so that some portion of the bottom is visible. You shouldn’t
automatically assume, however, that an open back setting is a guarantee of authenticity, but closed-backs are a good indicator that something may not be quite right.

Two exceptions to be aware of:
First, in the 1700s it wasn’t unusual to mount a diamond in a closed setting with a foil backing to make up for the brilliance lost by blocking the pavilion,
so keep that in mind when examining antique jewelry.

Next, jump forward a couple centuries and consider the modern channel mountings which need a closed back to support the delicacy of the setting, so such a stone could very well be real.

Rainbow Colors Test: Imitation stones will flash dispersion or fire, known as rainbows, just like real diamonds, but if the rainbow is either too bright or too dim, you’ll want to investigate further. And while this test is great for detecting many rare imitations, Cubic Zirconia (CZ) emits a rainbow a touch brighter than a real diamond, but it’s so close that you should make sure to compare a natural stone with CZ under direct sunlight or a regular light. The fluorescent lighting found in many jewelry stores dampens the effectiveness of this test.

The Glass Test: With any gemstone, glass has always been a popular, cheap substance to use for imitations. This test can be useful whether you’re shopping for diamonds, sapphires or any other semi-transparent stone. The trick is to examine different types of glassware up close, under a 10-power loupe even. Get to know the flaws common to glass. Look for:

Gas bubbles: Resemble little air bubbles under water.

Soft facet edges: You want to see crisp, sharp cuts.

Also look out for swirls like you might see in old windows, surfaces that aren’t flat and straight and surfaces that are pitted or wavy.We’ve all heard of the old scratch test. Diamonds, being the hardest substance on earth, are supposed to emerge unscathed after a few scrapes of a carbide scriber.
But gem testing has advanced far beyond this crude method of detection, and there is no guarantee the test won’t damage a priceless stone.

Of course with any quality gemstones, never believe too-good-to-be-true prices. Diamonds are precious stones and they will always be priced
accordingly.

Answer 2

Take it to a jeweler. Unless you have a jewelers piece that you can see the diamond closely. A real diamond would have some flaws if only minor. CZ would have no flaws. The less flaws a diamond has the more valuable.

Answer 3

You need to be trained to know for sure. A quick way is with a tool called a DiamondMate that you touch the stone with and it will beep to indicate a diamond. At this point, you either have a diamond or moissanite. You can either use another tool that can separate the two, or you can use a loupe or microscope to look for doubling of the back facets. Moissanites will have it, diamonds will not.

Answer 4

Try to cut a piece of glass with it..This trick never fails...

Answer 5

try to cut a glass with it!!! lol!!! no seriously diamond cuts glass.

Answer 6

bite in to it. no really just joking don't bite or you will be toothless. lol. let the jewelers look at it.

Answer 7

Take it to the jewellers.

Answer 8

You probably don't, but any competent jeweler can.

Answer 9

Suck on it real hard. If you die, its real. If you dont, its fake!