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Greendale Diamonds Supply South Africa |
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Diamond Clarity Related Terms
BLEMISHES - These occur on the surface of a diamond and are
usually a result of the environment that the diamond has been
exposed to either naturally or during the mining process.
Here are some of the most common:
1. Extra Facets - When an inclusion is near the surface this cut
is made to eliminate it. This raises the overall quality. In
many cases, they do not affect the clarity grade. With the naked
eye it is difficult to detect in most cases.
2. Naturals - This is a small part of the original rough
diamond's surface which is left on the polished diamond. These
are blemishes, but they might also be regarded as a sign of
skilled cutting; the presence of a natural reflects the cutter's
ability to design a beautiful polished gem, while still
retaining as much of the original crystal's weight as possible.
In many cases, naturals do not affect the clarity grade. In most
cases, they are undetectable to the naked eye.
3. Surface Graining - This is a naturally occurring blemish while
the diamond grows. It does not exactly occur on the diamond's
surface; it is an integral part of the stones structure and most
likely cannot be removed from the diamond without causing some
weight loss.
INCLUSIONS - These are certain characteristics that occur whithin the diamond itself. Almost all internal inclusions are
naturally occurring.
Here are some of the most common:
1. Included Crystals - Very minute crystals of other minerals or
materials that were absorbed while the diamond was growing. Some
are transparent and some have color, depending on what type of
crystals they are. Under a microscope they often look like
little round bubbles. These are usually undetectable to the
naked eye.
2. Pinpoints - These are included crystals that are so extremely
minute that, even when magnified to 10x, they still only look
like little dots. They can sometimes be tough to find.
3. Needles - These look like extremely slender tiny needles even
under microscope.
4. Knots - A knot is an included diamond crystal that reaches
from the inside to the surface of the polished diamond.
5. Chips - This is a small, very shallow opening on the surface
of the diamond. This could be a naturally occurring opening in
the diamond, or it could be created by removing a tiny crystal
or creating the diamond itself.
6. Cavities - This is a larger version of a chip. These are
sometimes created by the person doing the cutting when an
included crystal near the surface of the rough diamond is
removed, which may leave this cavity behind.
7. Feathers - These are small fractures in a diamond. Stress
usually causes this while the diamond was growing. This could be
occurring inside the diamond or on the surface. The term
"feather" comes from the fact that, under magnification, these
fractures often seem to have an indistinct, feathery shape to
them.
8. Internal Graining - This is a naturally occurring phenomenon
in some diamonds. This usually occurs within the diamond.
9. Clouds - Clouds are actually a cluster of a number of
extremely tiny inclusions that are too small to be
distinguishable from one another, even under magnification.
Therefore it is that, under a microscope, this cluster many times
looks like a soft transparent cloud inside the diamond.
Contact Us Email:
greendiam@tiscali.co.za
 
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Diamond Info |
| There
have always been things which looked like diamonds, but were not
diamond. I have already stated that in early times other stones
were confused with diamond. |
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