Carat Weight

 
The weight of a diamond is measured in carats. One carat is divided into 100 parts called "points", 1 ct. equals 1.0 ; 1/2 ct. equals 0.50. depending on the color, clarity and especially the cut.

Below are two identical pieces of rough, uncut diamonds, each in the same quantity and value.

Example 1: From one piece of rough, a diamond has been cut to Ideal proportions, retaining a weight of 1.0 ct. The light is totally reflected through the top.

Example 2: The second piece of rough has been "spread" in its cutting, resulting in a diamond weighing approximately 1.40 ct. All of the proportions have been exaggerated at the expense of the diamond's ability to reflect light.

Therefore, one can see that the value of a diamond can vary as much as 40% in the cutting alone.


 
The arrows in the diagram simulate the flow of light in the diamond

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THE 4 C's

CUT

CLARITY

COLOR
CARAT WEIGHT