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 LC, LB,
Color FY, FB, FG
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
IF Internally Flawless Stone are free from all
inclusion, but will have some minor
VVS1 Very Very slightly included 1 Minute inclusion that are difficult to locate
VVS2 Very Very slightly included 2 magnification.
VS1+ Slightly better than 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
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.
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
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
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.
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.
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.