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Diamond Clarity

GIA AGS SCAN D.N. CIBJO HRD*
Main Grades* Subgrades*
FL
(flawless)
0 Loupe
clean
FL Loupe
clean (lc).
Free from inclusions and bearding
Loupe
clean.
Inclusions do not exceed 5 micron*
Internally
flawless
1 IF
VVS1
(very, very slightly included)
VVS VVS1 VVS* (VVS1, VVS2)
Very, very small inclusion(s), very hard to find with a 10x loupe
VVS1
– VVS2: Inclusions visible through table have
average sizes of 12 micron (VVS1),
25 micron (VVS2); larger when
visible through other facets
VVS2
(very, very slightly included)
2 VVS2
VS1
(very slightly included)
3 VS VVS1 VS*
(VS1, VS2)
Very small inclusion(s), which can hardly be found with a 10x loupe
VS1
– VS2: Inclusions visible through table have
average sizes of 40 micron (VS1),
70 micron (VS2); larger when
visible through other facets
VS2
(very slightly included)
4 VVS2
SI1
(slightly included)
5 SI SI1 SI
(SI1, SI2)
Small inclusion(s), easy to find with a 10x loupe, not seen with the naked
eye through the crown side
S1.
Inclusions visible through table have average sizes of 150 micron
SI2
(slightly included)
6 SI2
I1
(imperfect)
7 P P1 PI
(Pique I)
Inclusion(s) immediately evident with a 10x loupe, difficult to find with
the naked eye through the crown side, not impairing brilliance
P1.
Inclusions which are visible through the crown-side have average sizes of
0.5 mm
8
I2
(imperfect)
P2 PII
(Pique II)
Large and/or numerous inclusion(s), easily visible to the naked eye through
the crown side and which slightly reduce(s) brilliance
P2.
Inclusions have average sizes of 1.5 mm; they slightly reduce brilliancy
9
I3
(imperfect)
10 P3 PII
(Pique II)
Large and/or numerous inclusion(s), very easily visible to the naked eye
through the crown side and which reduce(s) brilliance
P3.
Inclusions have average sizes of 3 mm or larger; they reduce the brilliancy
*
For stones under 0.47ct
*
For stones 0.47ct and larger
*Subdivision
of VVS and VS into two further subdivisions done only for sizes 0.47ct and
larger
*In
conformity with IOC rules, although latter have not published micron dimensions
for grades below Loupe clean. The mentioned size, are for bright inclusions,
sizes increase for less bright

Palloys
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