At VNR , we have developed a comprehensive in-house grading system that explains 10 diamond grading Parameters down to the smallest detail Based on Years of Research. We have designed this grading system for buyers who to read diamonds rather than just view.With the help of our Grading system details, our buyers can easily visualize the look of the diamond.
Shape is an important factor to consider when buying diamonds of princess cut, Pear or oval shaped or heart, cushion, marquise, emerald shape, shape is an important factor to consider.
SIZE RANGE :
|SIZE RANGE||0.30 to 0.399||0.40 to 0.499||0.50 to 0.699||0.70 to 0.899||0.90 to 0.999||1.00 to 1.499||1.50 to 1.999||2.00 to 2.499||2.50 to 2.999||3.00 to 3.999||4.00 to 10.999|
Clarity is a term used for describing the number and size of inclusion in a diamond. Inclusions are Mainly traces of non-crystallized carbon that may appear on the Diamonds internally or externally. A flawless Diamond Contains and is Considered Extremely rare and Valuable .Large-Inclusions affected the brilliance Of stone as they interfere with the dispersion of light.
We grade Diamonds on the Basis Of purity by Determining Following Categories:
|DESCRIPTION||Flawless||Innerly Flawless||Very Very Slightly Included-1||Very Very Slightly Included-1||Very Slightly Included-1||Very Slightly Included-2||Slightly Included-1||Slightly Included-2||Included-1||Included-2||Included-3|
Diamonds close to being colorless are more rare and valuable. Diamonds that display little color are allow more light to pass through. Resulting in a Burst of brilliance on the basis of color, Diamonds are Allocated a grade, Starting from D Grade(for colorless diamond) and ending In a Z+ grade. Some diamonds are also found in vivid color such as red, blue and pink.
|COLOR GRADES||D |E | F||G |H | I | J||K |L | M||N to R||S to Z|
|PARAMETERS||Colorless||Near Colorless||Faint||Very Light||Light|
Cut gives a unique Sparkle and Brilliance to the Diamonds. Cut Quality depends on the Craftsmanship of the diamond Cutting.
If a Diamond has Perfect color and Clarity but the cut is poor. It will lose its Brilliance.
We grade Diamonds On the basis of cut by determining Following Categories.
|DESCRIPTION||EXCELLANCE CUT||VERY GOOD CUT||GOOD CUT||FAIR CUT|
Polish mainly Describes the smoothness of the facets in a Diamond. This is the last step of the diamond Cutting Procedure. Brilliance of the diamond can be enhanced with a smooth polishing of the facets.
Diamond are grade on a basis of polish by determining Following categories :
|DESCRIPTION||EXCELLANCE POLISH||VERY GOOD POLISH||GOOD POLISH||FAIR POLISH|
Symmetry refers to the alignment of the facets (surface Condition)in a diamond. Each facet needs to be a Consistent Size and Positioned Opposite to the Corresponding facet. Poor Symmetry misdirects the light that enters in the diamond.
We grade Diamond on the basis of Symmetry By Determining Following Categories :
|DESCRIPTION||EXCELLANCE SYMMETRY||VERY GOOD SYMMETRY||GOOD SYMMETRY||FAIR SYMMETRY|
An Impeccable round Diamond with perfect angles is called ” Heart and Arrows(H&A) “.These Diamonds are graded with extra specification under VNR. They are not Included in the regular Cut criteria as H&A diamonds are considered better than the excellent cut diamond.
|DESCRIPTION||EXCELLENT H&A(100%)||VERY GOOD H&A (80%)||NOTE A H&A|
Luster and brilliance are two most valued attributes of a diamond. Luster describes a diamond’s fire and sparkle. Depending upon the light reflected from the stone .
VNR grades diamond on the basis of two levels of luster.
|DESCRIPTION||EXCELLANCE LUSTER||VERY GOOD LUSTER||GOOD LUSTER||FAIR LUSTER|
Milkyness is mainly a hazy inclusion in the diamond that appear white or grey in color. This haziness affects the Brilliance in a diamond.
Such Diamonds are further classified on the magnitude of Milkiness
|DESCRIPTION||SLIGHTLY MILKY||MEDIUM MILKY||HEAVY MILKY|
When we exposed to ultraviolet radiations, a diamond glows if it carries the characteristic of fluorescence.
Black light is the most common source of UV in exposure of which many diamonds give off a glowing blue coloration.
VNR grades diamonds based on the level of fluorescence present in it :