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VGS Parameters Developed indigenously through years of intensive research and continuous interaction with customers, the Venus Grading System specifies for every diamond a total of 16 grading parameters, thereby enabling accurate and detailed grading. Further critical sub-divisions of these 16 attributes in all, enable rational and logical derivation of each diamond to arrive at precise price – giving new meaning to the words ‘transparency’ and ‘consumer confidence’. Consistency in grading forms the core of the VGS. Ensuring this are :
Ask any Venus Jewel customer across the world what all these mean and an immensely satisfied smile of contentment lights up their face. Not surprising at all with unparalleled benefits like:
Detailed
Description of 16 Grading Parameters
VGS overcomes the insufficiencies of these factors to derive a rational pricing by introduction of the following additional parameters-
The weight of a diamond is measured in ‘Carats’ and ‘cents’ with 100 cents equaling 1 Carat. In the metric system, 1 Carat roughly equals 0.200 grams and is entirely different from ‘Karat’ used to indicate the purity of Gold.
Clarity refers to the number and density of inclusion in the diamond. Most diamonds contain some inner flaws, or inclusions, that occur during the formation process. The visibility, number of inclusion, location and size of these inclusions determine the clarity of a diamond. When the inclusions are discernible in the diamond under a 10x magnification lens, it can be said as an ideal clarity (a clean stone). Inclusions greatly affect the beauty and value of a diamond because they absorb the light rather than allowing it to be reflected back through the front side of the stone. Depending on the presence of internal & external imperfections present in the diamond, it is graded for its clarity, which can range anywhere between FL (Flawless) to I6 (Included 6). Venus
Jewel has gone a step further by narrowing the difference between
the clarity, of say SI1 and SI2. If a diamond grades to SI1 but
is slightly better than SI1, it is given a grade SI1+ by VGS.
Conversely, if a diamond grades to SI1 but is slightly weaker
than SI1, it is given a grade SI1- by VGS. The chart below shows grading as per VGS.
The color of a diamond is one of the major factors influencing the price of diamonds. Most diamonds have at least a trace of yellow or brown body color. With the exception of some natural fancy colors, such as blue, pink, purple or red, the colorless grade is the most valuable. If a diamond does not have enough color to be called fancy, then it is graded in a scale of colors ranging from colorless to light yellow, “D” through “R”. A diamond with a “D” color is Exceptional White. If the color is more intense than “R”, it is considered fancy. Other things being equal, a fancy yellow diamond fetches more price than a light yellow diamond. Below table explains the description of various colour grades from “D” to “R”
Also in grading colour of a diamond, we have gone a step further by narrowing the difference between two grades of colour say 'colours E and F' If a diamond grades to E but is slightly better than E, then it is given a grade E+ by VGS. Conversely, if a diamond grades to E but is slightly weaker than E, then it is given a grade E- by VGS. This makes it convenient for the customer to judge whether any diamond is towards the better or weaker side of a particular grade thereby justifying the price difference of every stones and makes it simple to understand between different colours of the diamond. Our highly skilled graders with the help of different master stones, grade colour of the diamond to offer consistent and accurate grading. Below chart shows our detailed colour grading as per VGS.
Beyond the normal grading of color, VGS has made provisions for grading the color shade (hue) in the diamond. Color shade (Hue) is graded as
Cut refers to the angles and proportions a skilled craftsman creates in transforming a rough diamond into polished. Based on scientific formulas, a well-cut diamond will internally reflect light from one mirror-like facet to another and disperse and reflect it through the top of the stone. This results in a display of brilliance and fire. Diamonds
that are cut too deep or too shallow lose or leak light through
the
side or bottom, resulting in less brilliance (fire) and ultimately
value.
The final step in diamond cutting is, polishing. A diamond should be free of any visible polish lines under 10x magnification. Hope diamonds are free of visible polish lines even under 100x magnification. The smoother the polish is the more beautiful and brilliant the diamond will appear.
For a diamond cut to have good symmetry, each facet must be consistently sized and positioned opposite its corresponding facet. Only diamonds that are cut with excellent symmetry receive a top symmetry grade. Symmetry addresses the alignment of one part of the diamond to another . The exactness of a finished diamond shape and the placement of its facet constitute symmetry. Highly
professional skilled laborers/artisans help to minimize or reduces
poor and/or careless workmanship such as an off-center table
or culet, a table not a regular octagon shape, an out-of-round
or wavy girdle, non-parallel girdle and table, facets which don't
meet or point properly or are misaligned between the crown and
pavilion.
This important parameter describes about the fire, sparkle and scintillation of the diamond. Thus it is a factor which truly describes the nature of diamond for which it has been desired. Depending upon the light reflected by the diamond the luster is graded on two levels
It is the emission of visible light by a diamond when it is exposed to ultraviolet radiation. In VGS, fluorescence is graded on five levels from FL0 to FL4 with FL4 being the strongest and FL0 being for no fluorescence.
Moreover, the hue of the fluorescence is also taken into account while grading the stone. The different grades on the basis of the same are
This
term explains the magnitude or size of an inclusion in the table
of the diamond compared to the total inclusions in the diamond.
The effect of table inclusion is minimum when center is clean
and it gradually increases to major inclusion at the center.
T0 means the effect of an inclusion is minimum in the table,
T2 means medium inclusion in the table and so on.
This term is used to indicate the amount of black inclusions as compared to the total inclusions in the diamond.
This
attribute describes the density of the inclusion. i.e. whether
the inclusion is concentrated or it is scattered in the diamond.
These
are Internal indications of irregular crystal growth, which
may appear milky, like faint lines or streaks, or may be colored
or reflective. This is a naturally occurring phenomenon in some
diamonds.
This term explains the effect of surface opens in the diamond, which may include nicks, pits, cavity etc. VGS also defines the position of open inclusion i.e. in the table, crown or / and pavillion.
The point on the bottom of a diamonds pavillion is called a culet. We have the following five grades in culet.
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Carat
Weight
Clarity
Color
Color
Hue (Shades)
Cut
Polish
Symmetry
Luster
Fluorescence
Fluorescence
Color
Table
Inclusion
Black
Inclusion (Natts)
Inclusion
Pattern
Internal
Graining
Opens
Inclusion
Culet 
