Everyone is aware of G. I. A. grading standards. Even we follow the same system, but have made minor additions and made the grading system simple so as to make the consumers understand better of what they are buying.

Perhaps the most important thing to remember when evaluating the quality of a diamond is about four Cs. So keeping in mind about all four Cs - color, clarity, cut, and carat weight, we have set the following grading parameters….

Color

GIA	Our Grading
D to M	D to M
N to R	M (down)
S to Z	Light Color LC, LB,
Z+	Fancy Color FY, FB, FG

 

Fluorescence

Fluorescence is a phenomenon occurring in diamonds and other gemstones. The fluorescence that occurs naturally in a diamond arises from submicroscopic structures within the diamond when it is exposed to UV light. Blue is the most common color of fluorescence, but others colors are (yellow, green, etc.) Fluorescence actually has a positive effect by making a diamond appear whiter.

 

Clarity

IF Internally Flawless Stone are free from all inclusion, but will have some minor
blemishes.

VVS1 Very Very slightly included 1 Minute inclusion that are difficult to locate under 10X
VVS2 Very Very slightly included 2 magnification.

VS1+ Slightly better than VS1
VS1 Very slightly included 1

VS2- Slightly lower than VS1 Minor inclusion, somewhat difficult to locate and somewhat easier to locate under 10X magnification
VS2+ slightly better than VS2
VS2 Very slightly included 2
VS2- Slightly lower than VS2

SI1+ Slightly better than SI1
SI1 Slightly included 1
SI1- Slightly lower than SI1

SI2+ Slightly better than SI2 These grade contains noticeable inclusions that are easily visible
SI2 Slightly included 2 under 10X magnification.
SI2- Slightly lower than SI2

S13+ Slightly better than SI3
SI3 Slightly included 3
SI3- Slightly lower than SI3

I1+ Slightly better than I1
I1 Included 1
I1- Slightly lower than I1

I2+ Slightly better than I2 Numerous obvious inclusion that are easily seen face-up
I2 Included 2 with the unaided eye. Serious included stone may affect
I2- Slightly lower than I2 durability

I3+ Slightly better than I3
I3 Included 3
I3- Slightly lower than I3

Diamond Clarity Characteristics In Brief

Diamonds have internal features, called inclusions, and surface irregularities, called blemishes. Together, they're called clarity characteristics. A clarity grade is determined by the relative absence of clarity characteristics.

Inclusions Plotting Symbols

Cavity (Khaad) A large or deep opening.
Chip (Chat) often a small or shallow opening usually on the girdle edge
Cloud (Dudhak) A hazy or milky area made up of a number of very small inclusions.

Feather (Jeerum) A separation or a break due to either cleavage or fracture often white and feathery in appearance.
Included Crystal A mineral crystal contained in a diamond.
Indented Natural A natural that penetrates the stone.
Internal Graining (aatri) Internal indications of irregular crystal growth; may appear milky, like faint lines or streaks or may be colored or reflective.
Knot (Ghant) An included diamond crystal that reaches the surface of fashioned stone.
Needle A long thin, included crystal that looks like tiny rod.
Pinpoint (fungi) A very small inclusion; under 10X, normally seen as a tin dot, either singly or in groups or strings.

Blemishes

Extra Facet A facet placed without regard for symmetry and not require by the cutting style.
Natural (Kori chamdi) Part of the original crystal surface remaining on the polished stone.

CUT

The proportions and finish of a polished diamond are its cut, or make. As a matter of fact, overall appearance – the brilliance, fire, and scintillation that makes diamonds uniquely beautiful – depends more on cut than anything else. Cut can also mean shape, as in emerald cut or marquise cut. Proportions are the size and angle relationships between the facets and different parts of the stone.

POLISH

Polish depend upon the quality of the facet surface condition.

SYMMETRY

A grading term means the exactness of shape and placement of facets. Variations in symmetry include off-center culets and tables, poor facet alignment, misshapen facets, out-of-round girdles, and wavy girdles.

CARAT WEIGHT

The aspect of carat weight that surprises people is the relationship between rarity, weight, and value. So it's not always easy to understand, or explain, why a 2.00 carat diamond might be worth much more than twice the value of a 1.00 carat diamond of similar clarity, cut and color.

Bottom line, large diamonds are rarer than small diamonds. The scarcer a diamond is, the greater it’s worth. So a larger stone doesn't just cost more. It also costs more per carat.

The standard unit of weight used for gemstones. A one-carat equals 0.200 gram, (or 200 milligrams). Usually abbreviated ‘ct’. If other factors are equal, the more a stone weighs, the more valuable it will be.