esearch Methodology...

To the majority of people around the world, gemstones represent the unique expression of love and attachment to Jewelry as well as to our loved ones. Gemstones such as Diamonds, Rubies, Sapphires, Emeralds, etc., also represent astrological properties and work to bring good luck to the wearer.

Of the 1000’s of gemstones in existence, Diamonds are the most desired for Jewelry. Its luster, fire and beauty have enchanted us through ages. The word “diamond” comes from the greek word “Adamas”, which means ‘hard’ and ‘untamable’.

The charm of any gemstone is created by the attractive combination of the visual effects, brilliance and dispersion, that results in a sparkling gem. This in turn is caused by what is known as the “4 C’s” of a gemstone, namely Clarity, Color, Cut & Carat.

This “4 C’s” method is the worldwide accepted method of Gemstone Grading as it gives the fullest details of the Gemstone’s characteristics. Here we shall try and educate you on what these terms exactly mean, and how we at IGR Labs imbibe them in our reports.

For Gemstone & Jewelry Grading we follow the “4 C’s” Method to Research the exact & unique characteristics of the diamonds.

  • Clarity
  • Color
  • Cut
  • Carat

The clarity of a gemstone is graded upon by looking at the Inclusions and Blemishes. The “Inclusions” are mostly small feathers, cracks and spots inside the Gemstone, and the “Blemishes” are the chips or scratches on the Gemstone surface. This is the most important and highly spoken about characteristic of a Gemstone, as it causes the highest degree of changes in the beauty of a Gemstone.

The clarity is graded not just on the size and number of inclusions and external blemishes, but also on the location and reflections of the same. Therefore a small black spot in the center of the Gemstone, where it is easily visible, will be less desirable than the same spot on the edge, where it is barely visible.

Therefore, using the industry standard 10x Jeweler’s Magnification Loupe, the highly trained gemologists at IGR Labs grade the gemstone on the Flawless to Included range as below:

FL: Flawless, no inclusions or external blemishes at all

IF: Internally flawless, no inclusions, but slight external blemishes are present

VVS1 / VVS2: Very Very Slightly Included, microscopic inclusions barely visible even under 10x magnification.

VS1 / VS2: Very Slightly Included, extremely small inclusions visible only under 10x magnification.

SI1 / SI2 / SI3: Slightly Included, small inclusions easily visible under 10x magnification mostly towards the gemstone edges, some might be visible to the naked eye too.

I1 / I2 / I3: Included, inclusions easily visible to the naked eye, coming towards the center of the Gemstone, causing a varying degree of harm to the beauty of the gemstone

Gemstones occur in almost every color, from the normally seen colorless, to the rarest of vivid blues, yellows and pinks. The Diamond Jewelry Industry around the world, mostly uses the colorless to light yellow or light brown colors which, as these are also the most sought after and also easily available colors in diamonds.

Each certificate has 4 parts:We at IGR Labs grade these normal color Diamonds in comparison with our set of master stones, and assign the color grade ranging from colorless to light yellow or light brown,. The gemstones of other color shades from fancy to vivid color hues, are graded as as fancy peacock blue, or vivid golden yellow.

The cut is the only human addition to the final gemstone, which gives it the shape, proportions, polish and luster. Any beautiful gemstone in its original rough form would look just like stone or glass. It is only the expert hands of a gemstone cutter which give it the beautiful form, first by way of cutting and shaping the gemstone, to ensure that least inclusions stay in the gemstone to bring out the fire in the gemstone, and then polishing and buffing it, to bring out the luster on the surface.

We at IGR Labs, grade the gemstone’s cut on various proportions, comparing it with the industry standard master chart for cut grading, therefore giving you the most comprehensive report about the cut.

This is the simplest to grade characteristic of a gemstone, as it is not manually graded, but simply measured on a weighing scale. A carat is equal to 0.200 grams, and a carat is further divide into 100 cents/points, so a quarter carat (25 cents/points) Gemstone would weigh 0.25 carats on the scale.

We at IGR Labs, use a highly advanced weighing scale which can measure up to a thousandth of a carat, that is 0.001 carats, or 0.005 grams.

This “4 C’s” method was introduced by GIA, and is now the globally accepted method.