Friday, November 26, 2010

4'C

What is 4'C

4'C
1.) Carat - 
               A carat is a unit of measurement used to weigh a diamond. One carat is equal to one fifth of a gram (0.2 gram) or 200 mg. One carat is equal to 100 points or 100 cents
Carat weight is the most objective of the 4 C’s of diamonds as it involves no estimates, comparisons or judgments. Carat weight is directly related to a diamond's value because (all else being equal) larger diamonds are rarer than smaller ones.

2.) Color -
              
The color of a diamond is one of the vital factors influencing the price of diamond. In diamonds, the best color is no color at all. Colorless diamonds are extremely rare, hence making them the most sought after. Contrary to common belief, all diamonds are not truly colorless. They actually come in many different colors - commonly faint yellow or brown.

Colorless diamonds allow the maximum refraction of light thus maximizing brilliance. In comparison Off White diamonds absorb light hence inhibiting brilliance.

There is now an internationally recognized color grading scale which starts at D (colorless), and goes down to Z (light yellow). Each letter grade represents a range of color and is a measure of how noticeable the color is. Colorless diamonds and diamonds that are yellow or yellowish brown are grouped into the categories shown below:
D
Absolutely colorless The highest color grade, which is extremely rare.
E
Colorless Only minute traces of color can be detected by an expert gemologist.
F
Colorless. Slight color detected by an expert gemologist, but still considered a "colorless" grade. A high-quality diamond.
G-H
Near-colorless Color noticeable when compared to diamonds of better grades, but these grades offer excellent value.
I-J
Near-colorless Color slightly detectable.
K-M
Noticeable color Light yellow
N-Z
Noticeable color Yellow



D E F G H I J K L M
These grades do not apply to fancy colored diamonds-they have their own color grading standards.
D, E or F commands the highest prices because of their rarity. Less than 1% of all diamonds are colorless hence they command a premium . For the untrained and unaided eye, it is very difficult to distinguish between D, E or F colors as they are all colorless with minuscule difference in color.
They are then followed by the near-colorless (G- H),followed by ( I- J) with G and H being universally most popular. The spectrum then gets a visible yellow hue from (K-R). Color more intense than (R) is considered fancy.
3.) Clarity -
                 
Diamonds are graded for clarity on the basis of internal and external imperfections present.
Flawless Diamonds
Shows no inclusions or blemishes of any sort when viewed under 10x magnification.
IF Diamonds (Internally Flawless)
Shows no inclusion of any sort when viewed under 10x magnification although minor blemishes may be present.
VVS1, VVS2 Diamonds (Very Very Slightly Included)
Inclusions almost impossible to detect with the naked eye and barely detectable under 10x magnification.
VS1, VS2 Diamonds Very Slight)
Inclusions are minute and normally not visible to the unaided eye but can be detected with little effort under a magnifying loupe.
SI1, SI2 Diamonds (Slightly Included)
Inclusions are visible under 10x magnifications, and may possibly be visible with the naked eye.

I1, I2, I3 Diamonds (Included)
Inclusions are clearly visible to the naked eye.
4.) Cut -
              
Cut refers to the quality of the proportions, polish and symmetry of a diamond. Of the 4C's, the cut is the aspect most directly influenced by man, whereas the other three C’s are influenced by nature. Hence here the expertise and skills of manufacturing comes into the picture.

More than 85% of our diamonds are Excellent cut diamonds


The brilliance of a diamond depends a lot on its cut. Whatever the shape, a well-cut diamond always reflects better light. Diamonds with perfect color or clarity also display reduced brilliance if it’s cut poorly.

Sub-grades in Cut as a parameter:
  • Excellent Cut
  • Very Good Cut
  • Good Cut
  • Fair Cut
  • Poor Cut

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