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Grading System

INCLUSION

It is a clarity characteristic found within a diamond. All kinds of internal imperfections formed before or after the crystallization of a diamond and all imperfections rising from the surface and developing into the interior of the stone are included under inclusions. They could be pin-points, crystalline objects, feathers, clouds, needles, twinning wisps, internal grainings, or even air bubbles trapped inside the diamond. Inclusions can vary in size, color, and relief. The location of the inclusion also has a significant impact on the value and look of a diamond. ROYAL DIAM GRADING SYSTEM (RGS) grades in a detailed manner the level and location of both inclusions ( Black & White ) in the diamond, and below is the overview of the same :

TABLE INCLUSIONS

Under RGS, Table Inclusion is primarily the amount of Inclusion visible in the Table area and the quantum of impact it has in context to the clarity of the stone.

Here at the RGS table inclusion is graded in two parts –

First, the overall impact of Table Inclusion in context to other inclusion present in the stone on the purity of the stone.
And secondly, the percentage of Black Inclusion present in the table inclusion.
Both are graded as N, V, S, M, and H with a Total combination of 21 grades. The first letter will indicate the percentage of inclusion affecting the clarity of the stone visible from the table area, and the second letter will be indicative of the percentage of black inclusion visible from the table area taking the table inclusions as the base.

NN

No inclusion visible from the table either black or white

VN

Less than 25 % inclusion affecting clarity visible from the table area and none of it is black

VV

Less than 25 % of inclusion affecting clarity visible from the table area and less than 25 % of it is black

VS

Less than 25 % of inclusion affecting clarity visible from the table area and less than 50 % of it is black

VM

Less than 25 % of inclusion affecting clarity visible from the table area and less than 75 % of it is black

For example, a black pinpoint in the table area for a VVS quality stone with no other inclusion visible from the stone the rating will be rated as HH because 100% inclusion is visible from the table area and is black, whereas an I2 stone with large pavilion glitz visible from crown will be rated as NN as table area is free of inclusions.

BLACK / NATTS INCLUSIONS

Black Inclusions are inclusions entrapped within a diamond and appear black in color. This attribute indicates the magnitude/impact of black inclusion(s), affecting the overall clarity of the diamond, as compared to the total inclusions. These inclusions are generally referred to as ‘Natts’. We at Royal Diam ( RGS ) grade Black Inclusion as follows:

NN

No inclusion visible from the table either black or white

VM

Less than 25 % inclusion affecting clarity visible from the table area and none of it is black

MI

Less than 25 % of inclusion affecting clarity visible from the table area and less than 25 % of it is black

MD

Less than 25 % of inclusion affecting clarity visible from the table area and less than 50 % of it is black

HY

Less than 25 % of inclusion affecting clarity visible from the table area and less than 75 % of it is black

For example, even a VVS quality stone with a single pinpoint, i.e. Black in color will be rated as VH as 100% of the inclusion is Black. On the other hand, a heavily included I3 Stone with white glitz, crystal, and cloud will be graded as NN or VM depending upon the presence of Black Inclusion.

OPEN INCLUSIONS

When an inclusion or a feather within a diamond is open near the surface, or if there is a chip, cavity, pit, nick or natural on the surface, then such flaws are graded as 'Opens’. Opens are chiefly the surface inclusion such as gletz, feather, etc. that are open in nature as they float up to the surface of the stone. Under royalgrading/ (RGS) we grade open as follows:

NN

No open inclusion present in the Stone

VM

Very minor opens in the stone

MI

Minor opens in the stone

MD

Medium opens in the stone

MD

Medium opens in the stone

MD

Medium opens in the stone

Further opens are located in three distinct parts of the stone i.e. Table, Crown, and Pavilion. At every individual position, open grading is categorized to allocate the nature of open in particular areas. For example, Table (NN), Crown (MD), and Pavilion (VH) indicate No Open in Table, Medium Open in Crown, and Very High Open in Pavilion Side.

INCLUSION PATTERN

This indicates two things; how densely the Inclusions are located within the Diamond, i.e. whether they are Concentrated or in a Scattered pattern, and how visible it is from the naked eye. Under Royal Grading System (RGS) we grade inclusion patterns as follows:

NON

No inclusion visible from the table either black or white

EOS1

Less than 25 % inclusion affecting clarity visible from the table area and none of it is black

E1S1

Less than 25 % of inclusion affecting clarity visible from the table area and less than 25 % of it is black

E2S1

Less than 25 % of inclusion affecting clarity visible from the table area and less than 50 % of it is black

E3S1

Less than 25 % of inclusion affecting clarity visible from the table area and less than 75 % of it is black

For example, a VS quality stone with a Single Black Inclusion will be termed as E3C3 type of stone or an I1 stone with a Single Large Glitz will also be termed E3C3.

Royal Diam

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Royal Diam

Dc 4220, Bharat Diamond Bourse, BKC, Bandra (E) Mumbai-400051
+1911-22-2361-1056/57
+(91)-22-2361-1055
sales@royaldiam.co.in

Available on

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Discover the brilliance of ROYAL DIAM, a renowned manufacturer and supplier of larger size (0.50Cts) diamonds in an exquisite array of Round and Fancy shapes. With a constant drive for innovation, ROYAL DIAM excels in crafting Cushions, Hearts, Emeralds, and Radiants, alongside traditional shapes like Marquise, Pear, Oval, and Princess, on a larger scale. Our commitment lies in maximizing the diamond's FIRE, BRILLIANCE, & SCINTILLATION while ensuring cost efficiency at every level. By staying at the forefront of industry developments, we continuously improve our products to exceed customer expectations.

In 1992-93, we established our first diamond cutting and manufacturing unit in Mumbai, focusing on processing rough diamonds of 10 carats and above. As our product segment expanded, we began producing 2-10 carats rough size in 1996. To further enhance our manufacturing capabilities, we set up a cutting and polishing unit equipped with cutting-edge technologies in Surat in 2003-04. Our Surat-based manufacturing unit, comprising a dedicated team of 120 skilled professionals, strives tirelessly to create the perfect diamonds for you.

Experience the magnificence of ROYAL DIAM's diamonds, meticulously crafted to captivate your senses and adorn your precious moments with unmatched beauty.

Discover the brilliance of ROYAL DIAM, a renowned manufacturer and supplier of larger size (0.50Cts) diamonds in an exquisite array of Round and Fancy shapes. With a constant drive for innovation, ROYAL DIAM excels in crafting Cushions, Hearts, Emeralds, and Radiants, alongside traditional shapes like Marquise, Pear, Oval, and Princess, on a larger scale. Our commitment lies in maximizing the diamond's FIRE, BRILLIANCE, & SCINTILLATION while ensuring cost efficiency at every level. By staying at the forefront of industry developments, we continuously improve our products to exceed customer expectations.

In 1992-93, we established our first diamond cutting and manufacturing unit in Mumbai, focusing on processing rough diamonds of 10 carats and above. As our product segment expanded, we began producing 2-10 carats rough size in 1996. To further enhance our manufacturing capabilities, we set up a cutting and polishing unit equipped with cutting-edge technologies in Surat in 2003-04. Our Surat-based manufacturing unit, comprising a dedicated team of 120 skilled professionals, strives tirelessly to create the perfect diamonds for you.

Experience the magnificence of ROYAL DIAM's diamonds, meticulously crafted to captivate your senses and adorn your precious moments with unmatched beauty.