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Diamond Grading
Reports
Many diamond grading
reports provide facts and information relating to the diamond you have
purchased. A typical diamond grading report details the following:
But would
you understand the meaning of a grading report stating that the diamond
was clarity VS2 and the color E with a faint level of fluorescence? All
the diamond grading charts are detailed below to help you through the
minefield of buying a diamond!
Diamond Grading - The Quality of the Diamond
The quality of a
diamond is determined by a number of different methods including the
famous 4 C s of
diamond grading (Cut, Color, Clarity and Carat Weight). This diamond
grading system provides an
excellent guide to the quality of a diamond. The numbers, sizes, colors, locations and
visibility of any inclusions and / or blemishes in a diamond can also effect the
grading and quality of a diamond. This page details the grading systems
and charts relating to diamond clarity, color grading for white or
colorless diamonds, carat weight and a diamond fluorescence grading chart.
Diamond Grading -
Clarity Grading
The majority of
Diamond Inclusions cannot be seen
by the human eye so systems have been developed to grade diamond clarity.
The different types of diamond grades reflecting clarity are detailed on
the Diamond Clarity Chart.
Diamond grading on a Diamond Clarity Chart ranges from high
quality, rare and expensive flawless to imperfect and cheap diamonds.
As the majority of inclusions cannot be seen by the naked eye they are
located by a jeweller under a 10 power magnification and then graded
according to their clarity. The grading and levels are described on the
Clarity Chart. An excellent grading guide when choosing diamonds.
|
Diamond Grading - Clarity
Chart |
|
Grading Abbreviation |
Grading Description |
Details
of Clarity |
Grading Quality |
|
F |
Flawless |
No
internal or external flaws |
Very Rare
and Expensive |
|
IF |
Internally Flawless |
No
internal flaws |
Rare and
Expensive |
|
VVS1 |
Very, Very Small Inclusions
Level 1 |
Very Difficult to see inclusions under 10x magnification |
Expensive |
|
VVS2 |
Very, Very Small Inclusions
Level 2 |
Difficult to see inclusions under 10x magnification |
Less
Expensive |
|
VS |
Very Small Inclusions |
Inclusions are noticeable to a jeweller under 10x
magnification |
↓ |
|
VS1 |
Very Small Inclusions
Level 1 |
Inclusions are noticeable to a jeweller under 10x
magnification |
↓ |
|
VS2 |
Very Small Inclusions
Level 2 |
Inclusions are noticeable to a jeweller under 10x
magnification |
↓ |
|
SI |
Small Inclusions |
Inclusions are easily seen to a jeweller under 10x
magnification |
↓ |
|
SI1 |
Small Inclusions
Level 1 |
Inclusions are easily seen under 10x magnification but
not visible to naked eye |
↓ |
|
SI2 |
Small Inclusions
Level 2 |
Inclusions are easily seen under 10x magnification but
not visible to naked eye |
↓ |
|
LI |
Large Inclusions |
Inclusions are visible to naked eye but minimum loss of
brilliance |
↓ |
|
LI1 |
Large Inclusions
Level 1 |
Larger
Inclusions visible to naked eye with small loss of
brilliance |
↓ |
|
LI2 |
Large Inclusions
Level 2 |
Larger
Inclusions visible to naked eye with dulling of
brilliance |
↓ |
|
LI3 |
Large Inclusions
Level 3 |
Larger
Inclusions visible to naked eye with brilliance
diminished |
Cheapest |
|
Grading Abbreviation |
Grading Description |
Details
of Clarity |
Grading Quality |
|
Diamond Grading - Clarity
Chart |
Diamond Grading -
Color Grading for White Colored or
Colorless Diamonds
White colored, or colorless, diamonds
are
categorised into the following: Colorless, Nearly colorless, Faintly
tinted (usually yellow), Lightly tinted (usually yellow) and Tinted
(usually yellow but may progress to brownish). The scale and grading for colorless diamonds goes from 'D' (colorless) to 'Z' (dark yellow). The
less color, the more expensive.
Diamond
Color Scale or Grading for
White or Colorless Diamonds |
|
Color |
Diamond Color
Scale or Grading |
Colorless
D E F |
Diamond Color Grade D
Color Grade E
Color Grade F |
Most Expensive & Desirable
|
Near Colorless
G H I J |
Color Grade G
Color Grade H
Color Grade I
Color Grade J |
↓ |
Faint Yellow
K L M |
Color Grade K
Color Grade L
Color Grade M |
↓ |
Very Light Yellow
N O P R |
Color Grade N
Color Grade O
Color Grade P
Color Grade R |
↓ |
Dark Yellow
S T U V W X Y Z |
Color Grade S
Color Grade T
Color Grade U
Color Grade V
Color Grade W
Color Grade X
Color Grade Y
Color Grade Z |
Cheapest &
Least Desirable |
|
Color |
Diamond Color
Scale or Grading |
Diamond
Color Scale or Grading for
White or Colorless Diamonds |
Diamond
Fluorescence Chart / Grading Reports
Many grading reports
confirm whether or not a diamond fluoresces, and if it does, the level
of the effect - none, faint, slight, moderate, strong or extreme. The
strength of fluorescence in diamonds is described in the following chart
by specific abbreviations:
|
Diamond Fluorescence
Grading Chart |
|
Grading |
Levels |
|
N, NO, NON |
No
Fluorescence |
|
F, FB, FT, FA |
Faint or Faint Blue Fluorescence |
|
SL, SLB, SLT |
Slight Fluorescence |
|
M, MO, ME, MD |
Medium or Moderate Fluorescence |
|
S, ST, STB, STG |
Strong Fluorescence |
|
E, EX, EXB, EF |
Extreme
Fluorescence |
|
Grading |
Levels |
|
Diamond Fluorescence
Grading Chart |
Diamond Grading - Carat Weight defines the weight, not the size, of a
Diamond
The Carat Weight defines
the weight, not the size, of a Diamond. The size of a diamond
relate to the proportions, dimensions or measurement in terms of length, width and
height. In diamond grading the carat weight is the standard unit of measure that
defines the actual weight of a diamond. A Carat is a standard unit of weight for diamonds.
In diamond grading carat weights are also expressed as "points" with a one carat
diamond equalling 100 points:
Diamond Grading
A guide to Diamond Grading
providing facts and information about clarity, color, carat weight and
fluorescence.
Diamonds - Precious - Stone
- Guide - Color - Facts - Information -Info - Jewelry - Jewellery
Quality - Clarity - Fluorescence - Color - Weight
Diamond Grading
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