The most common diamond color is yellow and brown. These diamonds are valued by how colorless they are. The less the color, the more the value.
Diamond color is graded according to a grading scale. Most diamonds have a slight hint of yellow and generally the diamond color scale is based on the amount of yellow present in a diamond. World widely accepted color grading system in this industry is the scale which begins with the grade D (colorless) and continues with increasing presence of color, to grade Z. Even slight color differences will make a very big difference in diamond quality and price.
It is extremely difficult to see the color differences within diamonds. It requires certain skill, controlled lighting, and definite viewing condition.
The diamond's clarity is a description of its internal purity due to its creation process.
With fewer characteristic presence within the stone, the diamond is more rare and posses a higher value.
Refer to the international applied clarity grading scale, diamonds are given a clarity grade that ranges from Flawless (FL) to diamonds with more prominent character inside the diamond (I3). All diamonds are systematically graded and plotted under 10X magnification.
Most diamonds are cut to round shape with 57/58 facets. An excellent cut determines the diamond’s maximization and balance of it’s brilliance, fire, and scintillation.
It is the work of a master cutter that allows the diamond to be cut in such a way as to permit the maximum amount of light to be reflected through the diamond. It is the cut that enables a diamond to make the best use of light.
Carat is the standard weight measuring unit for diamonds and other gemstones.
It takes its name from the carob seed. Because these small seeds had a fairly uniform weight, early gem traders used them as counterweights in their balance scales.
The modern metric carat was adopted by the United States in 1913 and other countries soon after.
Today, a carat of diamond weights exactly the same in every part of the world.
A carat is equal to 0.2 grams. Within the diamond trade, fractions of a carat are referred to as
"points" or simply as fractions. A 50 point diamond weighs 0.5 carats, whereas 1 carat diamond weighs 100 points.