purity diamonds is determined by five factors for each inclusion. These factors, which are given below, in the order of their importance, should be appraised as a whole rather than separately.
Table of Contents
Assigning the Clarity Grade of diamonds-purity diamonds
a): Number
The greater the number of inclusions, the poorer the grade.
b): Size
The larger the inclusions, the less brilliant the stone will be, hence the poorer the grade.
c): Position
The more central the inclusions the more the clarity will be impaired.
d): Brightness
The darker the inclusions, the greater its visibility hence the poorer the grade.
e): Nature
A faint inclusion would have a smaller effect on clarity than a dark inclusion of the same size and position if other factors are equal.
Clarity Grades of diamonds
Loupe Clean (IF)
A diamond can only be termed loupe clean if an expert examines it with a 10x loupe in normal light and it is found to be absolutely transparent and free from inclusions.
Very Very small inclusions (VVS; VVS1; VVS2)
This term describes cut diamonds which when viewed through a 10x loupe by an expert show only a very – very small inclusion, which is very difficult to be seen.
Crack-like, separately recognizable fringes on the girdle, as well as small blow indentations, which may extend into the interior of the stone, are counted into this clarity grade. The inclusion should be light-colored. For graders with little experience, these features of grade VVS are exceptionally difficult to see. In order to find these it is essential that the surface be thoroughly cleaned and any dust particles removed.
Half characters (0.47 cts.) and over, can optionally be subdivided into VVS1 and VVS2. If the general appearance of the diamond is closer to a higher clarity grade, the grader will decide on VVS1, if closer to a lower grade, VVS2 is applied.
Very Small Inclusion (VS: VS1; VS2)
Typical inclusions are easy to find at 10x magnification. SI2 stones may disclose inclusions to the naked eye when viewed through the pavilion side.
The inclusion under the table should be light & around the girdle can be small dark inclusion.
Small Inclusions:(SI)
Small inclusions are easy to find out under 10x magnification. SI2 stones may disclose inclusions to the naked eye when viewed through the pavilion side.
The inclusions under the table should be light and around the girdle can be dark inclusions.
Pique (I, II, III)
Inclusions, which are obvious when viewed 10x and which may be visible to the unaided eye through the crown side.
Pique: I
Slightly visible cloud, dark crystal, colorless crystal (all under the table). Cleavage visible from the front, small cracks from the girdle, rough girdle, large extra facet.
pique: II & III
Group of dark spots, dark clouds, and feathers (all under the table). Cleavage not under the table externally more scratches and abrasion. More abraded culet, large extra facet, etc.
if you wish to know more about the clarity of diamonds then please visit AGS Gemological Laboratory—an article about in detail with diamond clarity.
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