This Presentation Shows Some Basic Details About The 4C's Of Diamonds.For More Detailed Information Mail Us To : jkjewels@hotmail.com

1. Diamonds
Introduction To The 4 C’s
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2. The 4 C’s Of Diamonds
• Cut
• Color
• Clarity
• Carat Weight
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3. Cut
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4. • Cut gives the diamond its brilliance of the 4 C's, it's the only
one dependent on a human touch. Using precise
mathematical formulas, the cutter transforms a diamond in
the rough into a sparkling jewel that reflects and refracts
light.
• When the term "cut" is first introduced, most people think
of the diamond's shape. However, "cut" refers to the
diamond's proportions and finish. Cutting is the
contribution made by man transforming the rough
diamond crystal into a faceted, polished gem. The cutter's
primary goals are to produce the largest size diamond and
achieve the greatest optical beauty.
Cut
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5. Cut Grade
• Cut consists of various things such as :
- Total Depth %
- Over Weight %
- Painting / Digging
- Brilliance , Fire , Pattern / Heart & Arrow
- Proportion :- Table % , Girdle Thickness % , Pavilion Depth % ,
Crown Height % , Crown Angle° , Pavilion Angle°
- Fluorescence
- Culet
• Polish
• Symmetry
Note :- All the percentage written are in respect to the longest part
that is the Girdle Diameter of Diamond . Girdle Diameter is always
taken as 100% .
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7. Color
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8. Color
• The most desirable diamonds are colorless because the absence of
color enhances the diamond's ability to reflect a rainbow of color.
Diamonds are graded on a scale of D (almost clear white) to Z .
• When a diamond is graded darker than Z on the GIA scale it is
referred to as "fancy yellow", and the more color and intensity it
shows, the more valuable it will be.
• Most diamonds have a slight tint of yellow, though brown and grey
are also common modifying colors. Of all the diamond colors
available, most consumers select GIA grades from D to J color. The
difference in each letter grade is very subtle, and color comparison
diamonds of known grades are used under controlled lighting
conditions. When viewed in the face-up position, the average
person begins to see color in a diamond at about the I-J range.
Therefore color is a rarity factor that does affect appearance, rarity
and price, about 10-15% per color grade.
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11. • Rare and very expensive, colored or "fancy" diamonds are becoming ever more
popular. These diamonds reflect the colors of the rainbow and dazzle in brilliant
combinations of red, pink, blue, yellow, orange, green , grey & brown.
• Yellow and Brown are the most common colored diamond, while pink, red, blue &
green diamonds are extremely rare. Colored diamonds also tend to be smaller
than other diamonds and they are cut to maximize color, not clarity.
• Pink is known to be the Rarest Fancy Color available.
• The appearance of color is created from the combined effect of three elements:
- hue : the predominant color
- tone : the darkness of the color
- saturation : the intensity of the color
• These grades play a significant role in determining the value of colored diamonds;
the stronger the hue the more valuable the diamond. Saturation decrease the
strength of the diamond.
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12. Hue , Tone , Saturation Chart
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14. Clarity
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15. Clarity
• Diamonds can contain slight imperfections. Often invisible to the
naked eye, these natural birthmarks fall into two categories-
inclusions (internal) and blemishes (external). Fewer inclusions
increase the value of the stone.
• Diamonds form naturally deep within the Earth under tremendous
pressure and extreme heat, and as a result, most contain internal or
external features even in their polished state called clarity
characteristics. Just as no two people are alike, we all have
individual traits, no two diamonds are alike, they have
"fingerprints" or "birthmarks".
• A diamond's clarity is effectively determined by viewing the gem
using 10 power magnification under controlled lighting.
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16. Clarity Grade
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17. Clarity Grade
• Clarity Grade is classified into 6 Different Grades :-
- Flawless (F)
- Internally Flawless (IF)
- Very Very Slightly Included (VVS) : VVS1 , VVS2
- Very Slightly Included (VS) : VS1 , VS2
- Slightly Included (SI) : SI1 , SI2 , SI3
- Included (I) : I1 , I2 , I3
* Note :- SI3 is considered by only few labs. GIA does
not include SI3 Grade
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18. Clarity Grade
The Photo is for Illustration Purpose only. It may vary
according to the depth and location of the inclusion.JK Jewels

19. Carat Weight
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20. • Carat weight refers to the size of the diamond. Based on a standard
unit of measure, one carat is divided into 100 points. The term
originated from carob seeds that were used to balance scales in
ancient times.
• The term "Carat" is derived from the "Carob Seed", which is today
used as a food flavoring. In ancient times this fairly consistent seed
was used in "pan-balance" scales to determine the weight of
precious items traded like gold, silver, and yes gemstones and
diamonds! In the early 1900's the "Carat" was standardized to
equals 1/5 of a gram or 0.20 gm. Therefore, 5 carats = 1.00 gram.
The Carat is further broken down into "points". There are 100
points to a Carat, just like 100 pennies to a dollar. Common
diamond Carat Weights sold typically range from 1/5 Carat (20
points) to 1 Carat (100 points) and larger! Diamonds smaller than
1/5 Carat are referred to as "melee" diamonds, and are quite often
used to accent a center or feature diamond.
Carat Weight
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21. The Great Star of Africa
530.20 Carats - the Cullinan I or Star Africa
diamond is the largest cut diamond in the world.
Pear shaped, with 74 facets, it is set in the Royal
Scepter (kept with the other Crown Jewels in the
Tower of London). It was cut from the 3,106-
carat Cullian, the largest diamond crystal ever
found. The Cullian was discovered in Transvaal,
South Africa in l095 on an inspection tour of the
Premier Mine. The Cullian was cut by Joseph
Asscher and Company of Amsterdam, who
examined the enormous crystal for around six
months before determining how to divide it. It
eventually yielded nine major, and 96 smaller
brilliant cut stones. When the Cullian was first
discovered, certain signs suggested that it may
have been part of a much larger crystal. But no
discovery of the "missing half" has ever been
authenticated.
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22. Carat Weight
• Pricing
Larger diamonds are much more rare, thus commanding a higher price/per/carat. Carat
weight affects the value of a diamond by about 10-20% for each step in size difference. Also,
"magic sizes" refer to major carat weight categories, for example exactly 1.00 carat, or larger,
and can prompt "price premiums". To calculate the price of a diamond you multiply the carat
weight by the price/per/carat. For example: if a 1.25 carat diamond was priced at $10,000
per/carat the diamond would be sold for $12,500.
• Rarity
Of the 4 C's, Carat Weight is probably one of the most important considerations with respect
to rarity, value, and consumer preference. In fact, Carat Weight, or how much the diamond
weighs is the most significant value factor in a diamond. Because diamonds by nature are
rare, a 2 carat diamond is actually about 3 times more valuable than a comparable quality 1
carat size. Statistically a 1 carat is one in a million diamonds mined, and a 2 carat is one in five
million diamonds mined. Therefore, all things considered a 2 carat diamond is really "value
priced" based on the rarity factor.
Carat Weight
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24. Carat Weight
• Choosing The Right Size
In the selection process, most women today aspire to
owning an engagement diamond of at least 1 carat.
Statistically, the average size sold for engagement is
between a half and three-quarter carat. The carat
weight however, doesn't necessarily reflect how the
diamond appears. The most popular diamond shapes
sold are the Round and Princess Cuts. The outer
diameter of a 1 carat round diamond is about 6.5mm,
however if the diamond is cut too "deep" it will be
smaller in diameter, or if it's too "shallow" it will
appear larger in diameter.
Carat Weight
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25. Thank You
The Information In This Presentation Was Taken From
Many Reference Guides And Wikipedia.
Many of the images in this presentation were taken from
“ www.google.com/imghp ”
“ www.gia.edu ”
And Many More Diamond Related Sites.
We Would Like To Thank Such Sites For Helping Us
Complete This Presentation & Spread Knowledge
About Diamonds.
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26. Thank You For Sparing Time
For detailed information click on any one of the 4C’s in the
next slide.
For Any Kind of Doubts / Errors / Suggestions in this Presentation ,
Contact us at :
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