Home > B2C Exclusive Diamonds > Grading System > Cut
B2C Jewels Grading System
Cut
This is the only among the 4C’s of a diamond that is not created by nature, but crafted by the skills of expert craftsmen. Cut determines how a diamond reflects light. It is consequently responsible for the sparkle or brilliance of the diamond which in turn impacts its beauty and radiance. The cut or the 'make' of a diamond refers to the angles and proportions of all the facets created while transforming a rough diamond into a polished one.
The B2C Grading System has the sole available grading method that uses three additional aspects of Cut, namely Polish, Symmetry and Culet. Each of these are further judged on the basis of their constituent five or more grades for an accurate grading.
The B2C Jewels Grading System has the following six cut grades which impact the prices of a diamond. They are explained in the below table:
Cut Grade Description
HA Hearts & Arrow Cut
ID Ideal Cut
EX Excellent Cut
VG Very Good Cut
GD Good Cut
FR Fair Cut
 
Shape Size Clarity Color
 
Polish,
Symmetry
Cut
Pricing
Difference from
First Grade (%)
Round 2.019 VVS1 G EX
ID
EX
VG
GD
FR
 
-2.2
-7.2
-13.9
-30.6
The table above indicates the price difference between grades while other parameters remain constant. The prices are subjected to individual grade and market trends.
Cut - Polish
This refers to the overall condition, i.e. the sheen or shine, of a finished diamond's facet surface. The better the polish, the better the reflection from the surface of the diamond. The B2C Jewels Grading System the following five polished grades:
Each of the above 5 sub-grades directly impact the pricing of a diamond, which is explained in the example below:
Polish Grade Description
ID Ideal Polish
EX Excellent Polish
VG Very Good Polish
GD Good Polish
FR Fair Polish
 
Shape Size Clarity Color
 
Cut, Symmetry
 
Polish
 
Pricing
Difference from
First Grade (%)
Round 2.019 SI1 G EX
ID
EX
VG
GD
FR
 
-0.5
-2.6
-6.1
-11.6
The table above indicates the price difference between grades while other parameters remain constant. The prices are subjected to individual grade and market trends.
Cut - Symmetry
The symmetry of a diamond is elaborated as the arrangement of the facets, its proportions and angles, derived by the manufacturer. Excellent symmetry is the indication that a diamond has been manufactured with utmost care involving a high level of perfection and accuracy. Each of the five sub-grades, i.e. from ID to FR, directly impacts the pricing of a diamond. The Symmetry grades in B2C Jewels Grading System are mentioned below:
Symmetry Grade Description
ID Ideal Symmetry
EX Excellent Symmetry
VG Very Good Symmetry
GD Good Symmetry
FR Fair Symmetry
 
Shape Size Clarity Color Cut, Polish Symmetry
 
Pricing
Difference from
First Grade (%)
Round 2.019 VVS1 G EX
ID
EX
VG
GD
FR
 
-0.5
-2.6
-6.1
-11.6
The table above indicates the price difference between grades while other parameters remain constant. The prices are subjected to individual grade and market trends.
Cut - Spread Ratio
B2C Jewels considers 'Spread' as a crucial factor in grading diamonds. The term 'Spread' is a technical term which refers to a diamond’s face up size compared to its weight. It can also be referred to as 'weight ratio' or 'millimeter footprint versus weight'.
Theoretically, a standard or ideal round brilliant diamond would have proportions such as 1.00 CT stone and diameter of 6.47mm. When we compare any other diamond with this 'Ideal' diamond, which has zero or no spread, then this diamond would be equal in size, weight and proportion to the 'Ideal' diamond."
In other words, for a given diameter, negative spread indicates the diamond weight (in % terms) being in excess of what it ideally should have been. Whereas the reverse applies for positive spread, which indicates diamond weight being lesser than what it ideally should have been. Spread considers overall weight and diameter, so it becomes least important to remember parameters like Girdle, Depth and Crown Height. If somewhere the weight is more or less, it gets reflected in the spread, making it a logical parameter for purchasing diamonds.
However, spread as a parameter for deciding to purchase a diamond, functions as a precise indicator of whether the price of a given diamond is actually justified or not. In other words, to a customer, spread can clearly identify whether a diamond is carrying more or less weight for a given price than it ideally should.
Cut - Culet
The bottom most point or vertex of the diamond, where all the pavilion mains meet, is termed as the culet. If all pavilion mains do not meet at this point, or if the culet is chipped or broken, it is termed as open, in which case, it would resemble a miniscule facet.
Each of the 5 sub-grades, i.e. from NN to LG, of Culet will directly impact the pricing of a diamond, which is explained below:
Culet Grade Description
NN No Open Culet
VS Very Small Open Culet
SM Small Open Culet
MD Medium Open Culet
LG Large Open Culet
 
Shape Size Clarity Color
 
Cut, Polish,
Symmetry
Culet
 
Pricing
Difference from
First Grade (%)
Round 2.019 VVS1 G EX
NN
VS
SM
MD
LG
 
-2.0
-3.0
-4.0
-5.1
The table above indicates the price difference between grades while other parameters remain constant. The prices are subjected to individual grade and market trends.
*The above mentioned detail parameters are used for pricing purpose only.