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Diamond Guide

COMPARATIVE CHART OF DIAMOND GRADING SYSTEMS

CLARITY

For an explanation of the terms used in determining clarity, please see the section below the Table entitled, "HOW DIAMOND CLARITY IS DETERMINED?"

E.G.I. G.I.A. I.D.C

(HRD-CCIP)

OLD SOUTH AFRICAN
FLAWLESS FLAWLESS LOUPE CLEAN PURE
INTERNALLY FLAWLESS INTERNALLY FLAWLESS
VVS 1 VVS 1 VVS 1 VERY, VERY SMALL INCLUSION 1
VVS 2 VVS 2 VVS 2 VERY, VERY SMALL INCLUSION 2
VS 1 VS 1 VS 1 VERY SMALL INCLUSION 1
VS 2 VS 2 VS 2 VERY SMALL INCLUSION 2
SI 1 SI 1 SI SMALL INCLUSION 1
SI 2 SI 2 SI SMALL INCLUSION 2
P 1 IMPERFECT 1 P 1 IMPERFECT 1
P 2 IMPERFECT 2 P 2 IMPERFECT 2
P 3 IMPERFECT 3 P 3 IMPERFECT 3
REJECTION REJECTION REJECTION REJECTION

HOW DIAMOND CLARITY IS DETERMINED?

THE FL GRADE (FLAWLESS)

The term FL or flawless is used for diamonds in which a qualified observer, under the most favorable lighting conditions, cannot see internal characteristics (inclusions or other inhomogenities) and/or finish faults (insignificant cutting-faults or minor surface blemishes) by thorough examination with a microscope or a 10X magnifying lens, corrected for chromatic and spherical aberration (i.e., which reproduces colors correctly and does not distort). However, minor "naturals", minor girdle roughness and few small extra facets are permitted, provided they are not visible when the stone is viewed from above and do not flatten the girdle.

THE I.F. GRADE (INTERNALLY FLAWLESS)

A diamond which has no internal characteristics but which, due to minor finish faults, cannot be designated FL may be called I.F. or Internally Flawless provided the finish faults are so minute that they can be removed by a gentle polishing with only an insignificant loss of weight. Further, growth lines are permitted provided they do not give any color effect when the stone is viewed from above.

THE V.V.S. GRADES (VERY, VERY SMALL INCLUSIONS)

The V.V.S. is used for diamonds with internal characteristics very, very difficult for a qualified observer to find under observation conditions as described.

THE V.S. GRADES (VERY SMALL INCLUSIONS)

The term V.S. is used for diamonds in which it is difficult for a qualified observer, under observation conditions as described, to find either a few somewhat larger internal internal characteristics or several very small ones.

THE S.I. GRADES (SMALL INCLUSIONS)

The S.I. is used for diamonds in which a qualified observer may, without difficulty, under observation conditions as described, but, still only by a 10X magnification, find internal characteristics.

THE P. GRADES (PIQUE)

The term P. or Pique is used for diamonds in which a qualified observer with the naked eye can see internal characteristics and/or in which major finish faults occur.

IMPORTANT - PLEASE NOTE:

The explanation of grading diamonds provided here is only a guide. There are a number of factors that go into determining the value of a diamond that only a diamond expert can determine. Individual stone values depend on the specifics of each stone. Off-center culets, nonsymmetrical facet junctions, extremely wavy girdles and large naturals are some of the additional factors that should be considered along with color, cut and clarity. Always have a diamond expert examine and certify your valuable diamonds. Investment diamonds should be examined and certified by different labs.

See Also:

Diamond Guide
Diamond Jewelry in SpecialGifts.com
Jewelry Gifts from Specialgifts.com

[Diamond Buyer's Guide] [Special Gifts Home]




 
 

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