the 4cs
4C’s of diamond grading
The ultimate guide
Carat
The weight of a diamond is measured in carats, with one carat equivalent to 200 milligrams. Carat size influences a diamond's rarity and value in the world of gemmology.
0,05 Ct
2,5 mm
0,10 Ct
3,0 mm
0,20 Ct
3,8 mm
0,25 Ct
4,1 mm
0,30 Ct
4,5 mm
0,40 ct
4,8 mm
0,50 ct
5,2 mm
0,70 ct
5,8 mm
0,90 Ct
6,3 mm
1,00 Ct
6,5 mm
1,25 Ct
6,9 mm
1,50 Ct
7,4 mm
1,75 Ct
7,8 mm
2,00 Ct
8,2 mm
2,50 Ct
2,5 mm
3,00 Ct
9,4 mm
Color
In gemmology, the color of a diamond is graded on a scale from D to Z, assessing its degree of colorlessness or presence of yellow-brown tint. This evaluation influences its value.
d - f
colorless
g - j
near colorless
k - m
slightly tinted
n - r
very light color
s - z
light color
Clarity
Clarity evaluates a diamond’s freedom from internal and external clarity characteristics which occurred during formation, polishing, or wear and tear
Internally Flawless
Very Very Slightly Included
Very Slightly Included
Slightly Included
Included
Cut
The cut of a diamond is crucial, determining its brilliance and sparkle. A well-crafted cut enhances light reflection, showcasing the diamond's quality and creating a mesmerizing play of brilliance.
Proportions
Light Return
Too Shallow
Too deep
excellent to good
Light Return
ideal - excellent to very good