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Origin of the Diamond 4Cs


Every diamond is a miracle of time and place and chance.

Like snowflakes, no two are exactly alike.


Until the middle of the twentieth century, there was no agreed-upon standard by which diamonds could be judged. GIA created the first, and now globally accepted standard for describing diamonds: Color, Clarity, Cut, and Carat Weight. Today, the 4Cs of Diamond Quality is the universal method for assessing the qualityof any diamond, anywhere in the world. The creation of the Diamond 4Cs meant twovery important things: diamond quality could be communicated in a universal language,and diamond customers could now know exactly what they were about to purchase.

Diamond Color and Clarity

 

The diamond color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. GIA's D-to-Z diamond color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones stones of established color value.

The system is the industry's most widely accepted grading system as well . The scale begins with the letter D, representing colorless, and continues, with increasing presence of color, to the letter Z.

Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference in diamond quality and price.

 

 

 
GIA Color Scale D E F G H I J K L M O P Q R S T U Y X W Z
  Colorless Near Colorless Faint Very Light Light

 

Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of internal characteristics called 'inclusions' and external characteristics called 'blemishes.'

Evaluating diamond clarity involves determining the number, size, relief, nature, and position of these characteristics, as well as how these affect the overall appearance of the stone. While no diamond is perfectly pure, the closer it comes, the higher its value. The GIA Diamond Clarity Scale has 6 categories, some of which are divided, for a total of 11 specific grades.

Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader. To the naked eye, a VS1 and an SI2 diamond may look exactly the same, but these diamonds are quite different in terms of overall quality. This is why expert and accurate assessment of diamond clarity is extremely important.

   

 

 
GIA Clarity Scale FLAWLESS INTERNALLY FLAWLESS VVS1 VVS2 VS1 VS2 S1 S2 I1 I2 I3
      Very Very Slightly Included Very Slightly Included Slightly Included Included

 

 

 

 

Every diamond is a miracle

 

 

Diamond Cut

Diamonds are renowned for their ability to transmit light and sparkle so intensely. We often think of a diamond's cut as shape (round, emerald, pear), but a diamond's cut grade is really about how well a diamond's facets interact with light. Precise artistry and workmanship are required to fashion a stone so its proportions, symmetry, and polish deliver the magnificent return of light only possible in a diamond.

A diamond's cut is crucial to the stone's final beauty and value. And of all the diamond 4Cs, it is the most complex and technically difficult to analyze. To determine the cut grade of the standard round brilliant diamond - the shape that dominates the majority of diamond jewelry – GIA calculates the proportions of those facets that influence the diamond's face-up appearance. These proportions allow GIA to evaluate how successfully a diamond interacts with light to create desirable visual effects such as:

 

Brightness: Internal and external white light reflected from a diamond

Fire: The scattering of white light into all the colors of the rainbow

Scintillation: The amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond

 

GIA's diamond cut grade also takes into account the design and craftsmanship of the diamond, including its weight relative to its diameter, its girdle thickness (which affects its durability), the symmetry of its facet arrangement, and the quality of polish on those facets.

The GIA Diamond Cut Scale for standard round brilliant diamonds in the D-to-Z diamond color range contains 5 grades ranging from Excellent to Poor.

GIA Cut Scale EXCELLENT VERY GOOD GOOD FAIR POOR


Diamond Carat Weight

Diamond carat weight is the measurement of how much a diamond weighs. A metric "carat" is defined as 200 milligrams. Each carat can be subdivided into 100 'points.' This allows very precise measurements to the hundredth decimal place. A jeweler may describe the weight of a diamond below one carat by its 'points' alone. For instance, the jeweler may refer to a diamond that weighs 0.25 carats as a 'twenty-five pointer.' Diamond weights greater than one carat are expressed in carats and decimals. A 1.08 carat stone would be described as 'one point oh eight carats.' All else being equal, diamond price increases with diamond carat weight, because larger diamonds are more rare and more desirable. But two diamonds of equal carat weight can have very different values (and prices) depending on three other factors of the diamond 4Cs:Clarity, Color, and Cut. It's important to remember that a diamond's value is determined using all of the 4Cs, not just carat weight. Information are reference only. Ture diamond may vary based on monitor detail.

 

Reference : GIA (http://gia4cs.gia.edu/)

 

Diamond

stone of the king

 

A diamond is forever, and so is the love for
diamonds women will always have.

It sparkles with extraordinary value,
and some with sentimental value.

A diamond expresses endless love,
no mater what the love is focused on, a fiancé,

family member, or the diamond itself.
But how much do you know about the

diamond you are paying for?
Diamonds have much more
to them then just their

never-ending beauty. 
In this speech we should
dig down deep into the history and

properties of a diamond, 
polish up on the cutting and rating of a diamond,

and shine a light on the marketing
of a diamond and famous diamonds.

Webster's dictionary defines a diamond
as a native crystalline carbon that

is usually nearly colorless, that when transparent and
free from flaws is

highly valued as a precious stone,
and that is used industrially
as an abrasive powder and in...


Diamond Color and Clarity

 

The diamond color evaluation of most gem-quality diamonds is
based on the absence of color.
A chemically pure and structurally perfect diamond has no hue,
like a drop of pure water,
and consequently, a higher value. GIA's D-to-Z diamond color-grading
system measures the degree of colorlessness
by comparing a stone under controlled lighting
and precise viewing conditions to masterstones 
stones of established color value.

The system is the industry's most widely
accepted grading system as well .
The scale begins with the letter D,
representing colorless, and continues,
with increasing presence of color, to the letter Z.

Many of these color distinctions are so subtle
that they are invisible to the untrained eye;
however, these distinctions make a very
big difference in diamond quality and price.


Diamond Cut

Diamonds are renowned for their ability
to transmit light and sparkle so intensely.
We often think of a diamond's cut
as shape (round, emerald, pear), but a diamond's cut grade
is really about how well a diamond's facets interact with light.
Precise artistry and workmanship
are required to fashion a stone so its proportions, symmetry,
and polish deliver the magnificent
return of light only possible in a diamond.

A diamond's cut is crucial to the stone's final beauty and value.
And of all the diamond 4Cs, it is the most complex and technically
difficult to analyze.
To determine the cut grade of the standard
round brilliant diamond -
the shape that dominates the majority of diamond jewelry
– GIA calculates the proportions of those facets that
influence the diamond's face-up appearance.
These proportions allow GIA to evaluate how
successfully a diamond interacts with light
to create desirable visual effects such as:

 

Brightness: Internal and external white light reflected from a diamond

Fire: The scattering of white light into all the colors of the rainbow

Scintillation: The amount of sparkle a diamond produces,
and the pattern of light and dark areas
caused by reflections within the diamond

 

GIA's diamond cut grade also takes into account the design
and craftsmanship of the diamond,
including its weight relative to its diameter,
its girdle thickness (which affects its durability),
the symmetry of its facet arrangement,
and the quality of polish on those facets.

 

The Diamond Cut Scale for standard round brilliant
diamonds in the D-to-Z diamond color range
contains 5 grades ranging
from Excellent to Poor.


Diamond Carat Weight

Diamond carat weight is the measurement of
how much a diamond weighs.
A metric "carat" is defined as 200 milligrams.
Each carat can be subdivided into 100 'points.'
This allows very precise measurements
to the hundredth decimal place.
A jeweler may describe the weight of a diamond below one carat
by its 'points' alone. For instance, the jeweler may refer
to a diamond that weighs
0.25 carats as a 'twenty-five pointer.'
Diamond weights greater than one carat
are expressed in carats and decimals.
A 1.08 carat stone would be described
as 'one point oh eight carats.' All else being equal,
diamond price increases with diamond carat weight,
because larger diamonds
are more rare and more desirable.
But two diamonds of equal
carat weight can have very different
values (and prices) depending
on three other factors of the diamond
4Cs:Clarity, Color, and Cut. It's important to remembe
r that a diamond's value
is determined using all of the 4Cs, not just carat weight.
Information are reference only.
Ture diamond may vary based on monitor detail.
Reference : GIA (http://gia4cs.gia.edu/)