The Diamond is a mineral composed of carbon, and it is one of the hardest (Mohs hardness 10) natural materials. The weight of a diamond is measured in carats, equivalent to 0.20 gr. The value of a diamond is exponential in relation to its mass. i.e: a two-carat diamond has a superior evaluation than two diamonds of one carat, since it is considered rare.
1 Carat (weight)
2 Clarity (purity)
3 Color (color)
4 Cut (size)
The weight unit of the diamond is the carat. This word comes from the Hebrew "KHAROUV".
1 carat equals 0.20 grams, below the Carat the measurements enter the hundredths.
The weight of the stone determines its size.
All diamonds have traces of their history, and these traces are called inclusions. The inclusions are natural imperfections that may affect its quality.
The clarity scale created by different Gemological Institutes (HRD-GIA-IGI...) gives the size, number, location and visibility of the internal features when examined at 10X magnification.
This scale is as follows:
IF = No Default visible with a magnifying glass or microscope.
VVS1 = Very very small inclusions visible to the naked eye.
VVS2 = Very very small inclusions visible to the naked eye.
VS1 = Very small inclusions visible to the naked eye.
VS2 = Very small inclusions visible to the naked eye.
SI1 = Small inclusions visible to the naked eye.
SI2 = Small inclusions visible to the naked eye.
I1 = Imperfect Diamond, inclusions visible to the naked eye.
I2 = Imperfect Diamond, inclusions visible to the naked eye.
I3 = Imperfect Diamond, inclusions visible to the naked eye.
Most diamonds varies in color from white to pale yellow. Diamonds are graded by color. These colors are denoted by a code (below) using the letters of
the alphabet, and this code begins with the letter D for Diamond.
D = Exceptional White +
E = Exceptional White
F = Rare White +
G =Rare White
H = White
I = White nuanced
J = White shade
K = Slightly tinted
L = Light tinted
However, diamonds can be formed in all sorts of colors, ranging from brown to striking yellow, pink, purple, red and blue. They are called fancy colors.
Among the “4C’s” it is the size of the diamond that is the most important, its symmetry and balance are the guarantor of the beauty of the diamond.
Indeed, if the notions of purity and color seem familiar, the proportions of size are more rarely familiar. However, they are an essential factor of quality. They affect directly the rendering of brilliance and "fire" of the diamond. At the same color, a diamond with good proportions will be much brighter than a pure diamond cut incorrectly.