How to Tell if a Diamond is Real

Finding out whether or not your diamond is real is a
tantalizing proposition — do you want to know without
a doubt? Most curious citizens turn to a professional
jeweler in order to suss it out. But you don't have to be
Sherlock to tell the real from the duds. A little bit of
light, some water or warm breath, and a jeweler's loupe
is all you need. See Step 1 for additional details and
information about the wonderful world of diamonds.

Method One of Five:
Testing Mounted Diamonds at Home
1
Use the fog test. Put the stone in front of your
mouth and fog it like you would a mirror. If it stays
fogged for a couple seconds, it’s probably a fake — a
real diamond disperses the heat from your breath
instantaneously and won't fog up easily. Even if you
wait in between fogging it up and looking at it, it will
still clear much faster than a fake.
It can help to use a stone you know is real next to
the suspect stone and fog both. You can watch
how the real one stays clear while the fake one
fogs over; if you breathe on fake diamonds
repeatedly, you will see condensation start to
build up. With each puff, the fake stone will fog
up more and more, while the real one will still be
clean and clear.
2
Check the setting and mount. A real diamond is not
likely to be set in a cheap metal. [1] Stamps inside the
setting indicating real gold or platinum (10K, 14K,
18K, 585, 750, 900, 950, PT, Plat) are a good sign,
while a "C.Z." stamp will give away that the center
stone is not a real diamond. [2] C.Z. stands for Cubic
Zirconia, which is a kind of synthetic diamond.
3
Use a jeweler's loupe to inspect the diamond.
You can usually borrow one from the jewelry store.
Mined diamonds usually have small naturally
occurring imperfections, which are called
"inclusions," that can be seen with a loupe. Look for
small flecks of minerals, or very slight color changes.
These are both signs that you're dealing with a real,
albeit imperfect, diamond.
Cubic zirconium and lab-grown diamonds (which
should pass all of the other tests) usually don't
have imperfections. That's because they are
grown in sterile environments instead of
produced by chance in the Earth's laboratory. A
gem that is too perfect is more often than not a
fake.
Is it possible, however, that a real diamond will
be flawless. Don't use imperfections as the
determining factor in whether your diamond is
real or not. Rule out fakes using other tests first


Method Two of Five:
Testing Unmounted Diamonds at Home
1
Look at the stone's refractivity. Diamonds sharply
bend, or refract, the light that passes through them,
resulting in their strikingly brilliant appearance.
Stones like glass and quartz sparkle less because they
have a lower refractive index. A stone's brilliance is
difficult to alter in any way, even with an expert cut,
because it's an inherent property of the stone. By
taking a close look at the stone's refractivity, you
should be able to tell whether it's the real thing or a
fake. Here are a few ways to do it:
The newspaper method: Turn the stone upside
down and place it on a piece of newspaper. If
you can read print through the stone, or even see
distorted black smudges, then it probably isn't a
diamond. A diamond would bend the light so
sharply that you wouldn't be able to see the print.
(There are a few exceptions: if its cut is
disproportionate, the print can still be visible
through a real diamond.)
The dot test: Draw a small dot with a pen on a
piece of white paper and place the stone over the
center of the dot. Look directly down on it. If
your stone is not a diamond, you will see a
circular reflection in the stone. You won't be able
to see the dot through a real diamond.
2
Observe the reflections. A real diamond's
reflections usually show up in various shades of gray.
Look straight down through the top of the diamond.
If you see rainbow reflections, you're either dealing
with a low-quality diamond or a fake
Instead, check for "sparkles." A real diamond will
sparkle significantly more than an equivalently-
size piece of glass or quartz. You may want to take
along a piece of glass or quartz as reference.
Don't confuse sparkle with reflection. Sparkle has
to do with the brilliance or intensity of the light
that's refracted by the cut of the gem. Reflection
has to do with the color of the light that's
refracted. So look for intense light, not colored
light.
There is a stone that has even more luster than a
diamond: moissanite. This gemstone is so similar
to diamond that even jewelers have a hard time
telling them apart. To tell the difference without
special equipment, hold the stone close to your
eye. Shine a penlight through the stone. If you
see rainbow colors, that's a sign of double
refraction. This is a property of moissanite, but
not of diamond.
3
Drop the stone in a glass of water and see if it
sinks to the bottom. Due to its high density, a real
diamond will sink. A fake one will float at the top of
the surface or in the middle of the glass.
4
Heat up the stone and see if it shatters. Heat up a
suspect stone with a lighter for 30 seconds, then drop
it straight into a glass of cold water. The rapid
expansion and contraction will overwhelm the tensile
strength of weaker materials like glass or quartz,
causing the stone to shatter from the inside. Real
diamond is strong enough that nothing will happen.

.
source. http://www.naijaxplorer.com/forum2_theme_111605920.xhtml?tema=2

so nobody uses diamonds here?

Ok what about firing it with matches

Keneking: Ok what about firing it with matches

Khaynet:
How to Tell if a Diamond is Real

Finding out whether or not your diamond is real is a
tantalizing proposition — do you want to know without
a doubt? Most curious citizens turn to a professional
jeweler in order to suss it out. But you don't have to be
Sherlock to tell the real from the duds. A little bit of
light, some water or warm breath, and a jeweler's loupe
is all you need. See Step 1 for additional details and
information about the wonderful world of diamonds.

Method One of Five:
Testing Mounted Diamonds at Home
1
Use the fog test. Put the stone in front of your
mouth and fog it like you would a mirror. If it stays
fogged for a couple seconds, it’s probably a fake — a
real diamond disperses the heat from your breath
instantaneously and won't fog up easily. Even if you
wait in between fogging it up and looking at it, it will
still clear much faster than a fake.
It can help to use a stone you know is real next to
the suspect stone and fog both. You can watch
how the real one stays clear while the fake one
fogs over; if you breathe on fake diamonds
repeatedly, you will see condensation start to
build up. With each puff, the fake stone will fog
up more and more, while the real one will still be
clean and clear.
2
Check the setting and mount. A real diamond is not
likely to be set in a cheap metal. [1] Stamps inside the
setting indicating real gold or platinum (10K, 14K,
18K, 585, 750, 900, 950, PT, Plat) are a good sign,
while a "C.Z." stamp will give away that the center
stone is not a real diamond. [2] C.Z. stands for Cubic
Zirconia, which is a kind of synthetic diamond.
3
Use a jeweler's loupe to inspect the diamond.
You can usually borrow one from the jewelry store.
Mined diamonds usually have small naturally
occurring imperfections, which are called
"inclusions," that can be seen with a loupe. Look for
small flecks of minerals, or very slight color changes.
These are both signs that you're dealing with a real,
albeit imperfect, diamond.
Cubic zirconium and lab-grown diamonds (which
should pass all of the other tests) usually don't
have imperfections. That's because they are
grown in sterile environments instead of
produced by chance in the Earth's laboratory. A
gem that is too perfect is more often than not a
fake.
Is it possible, however, that a real diamond will
be flawless. Don't use imperfections as the
determining factor in whether your diamond is
real or not. Rule out fakes using other tests first


Method Two of Five:
Testing Unmounted Diamonds at Home
1
Look at the stone's refractivity. Diamonds sharply
bend, or refract, the light that passes through them,
resulting in their strikingly brilliant appearance.
Stones like glass and quartz sparkle less because they
have a lower refractive index. A stone's brilliance is
difficult to alter in any way, even with an expert cut,
because it's an inherent property of the stone. By
taking a close look at the stone's refractivity, you
should be able to tell whether it's the real thing or a
fake. Here are a few ways to do it:
The newspaper method: Turn the stone upside
down and place it on a piece of newspaper. If
you can read print through the stone, or even see
distorted black smudges, then it probably isn't a
diamond. A diamond would bend the light so
sharply that you wouldn't be able to see the print.
(There are a few exceptions: if its cut is
disproportionate, the print can still be visible
through a real diamond.)
The dot test: Draw a small dot with a pen on a
piece of white paper and place the stone over the
center of the dot. Look directly down on it. If
your stone is not a diamond, you will see a
circular reflection in the stone. You won't be able
to see the dot through a real diamond.
2
Observe the reflections. A real diamond's
reflections usually show up in various shades of gray.
Look straight down through the top of the diamond.
If you see rainbow reflections, you're either dealing
with a low-quality diamond or a fake
Instead, check for "sparkles." A real diamond will
sparkle significantly more than an equivalently-
size piece of glass or quartz. You may want to take
along a piece of glass or quartz as reference.
Don't confuse sparkle with reflection. Sparkle has
to do with the brilliance or intensity of the light
that's refracted by the cut of the gem. Reflection
has to do with the color of the light that's
refracted. So look for intense light, not colored
light.
There is a stone that has even more luster than a
diamond: moissanite. This gemstone is so similar
to diamond that even jewelers have a hard time
telling them apart. To tell the difference without
special equipment, hold the stone close to your
eye. Shine a penlight through the stone. If you
see rainbow colors, that's a sign of double
refraction. This is a property of moissanite, but
not of diamond.
3
Drop the stone in a glass of water and see if it
sinks to the bottom. Due to its high density, a real
diamond will sink. A fake one will float at the top of
the surface or in the middle of the glass.
4
Heat up the stone and see if it shatters. Heat up a
suspect stone with a lighter for 30 seconds, then drop
it straight into a glass of cold water. The rapid
expansion and contraction will overwhelm the tensile
strength of weaker materials like glass or quartz,
causing the stone to shatter from the inside. Real
diamond is strong enough that nothing will happen.

.
source. http://www.naijaxplorer.com/forum2_theme_111605920.xhtml?tema=2

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