What Is an IF Diamond Clarity Grade?

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Clarity Grade Guide

The IF Clarity Grade

Internally Flawless means exactly that: nothing inside the stone, at any magnification. Only trivial surface marks separate it from the top of the scale. This is the grade you buy for the certificate, knowingly and happily, or skip entirely.

Internally Flawless

What IF Actually Means

An IF diamond shows no inclusions to a skilled grader at 10x magnification, only insignificant blemishes confined to the surface, most often faint polish traces. Internally, it is indistinguishable from Flawless; the two grades are separated by marks a polishing wheel left behind, not by anything within the crystal. Together with FL, this is the rarest territory on the clarity scale, and the market prices that scarcity accordingly.

What IF does not buy is visible beauty beyond the grades below it. A VVS or VS1 stone of equal cut, color, and weight looks identical across a table, under candlelight, and in every photograph ever taken of the ring. The purchase is about knowing what you own. For some buyers that knowledge is worth every dollar; our role is only to make sure you spend it deliberately.

FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2
I1+
RarestMost included

Where IF sits on the GIA clarity scale. The full scale, grade by grade, lives in our complete clarity guide.

The Neighbor Argument

Step Up, Stay, or Step Down

Every clarity decision is really a comparison with the grades on either side. Here is that comparison, made honestly.

Above: FL

When to Step Up

Step up only if perfection itself is the collection thesis. The difference is surface marks a loupe struggles to find.

This Grade: IF

When to Stay

Choose IF when internal perfection matters to you as a fact about the stone. It is the purist's grade, and step cuts show it off best: an emerald or asscher cut IF is a pane of absolutely clean glass.

Below: VVS1

When to Step Down

Step down if the certificate premium serves no purpose for you. VVS1 is visually identical and meaningfully more accessible.

Every stone we recommend is scored by ROSI™, our gemological intelligence, built by our gemologists, with clarity verified by a human eye against the actual stone. Request a ROSI™ Score Report on any diamond, ours or anyone else’s.

Shape Guidance

Where IF Belongs

IF earns its keep most visibly in step cuts, where the wide open facets of an emerald or asscher act as a window and reward genuinely empty interiors. In brilliant cuts the sparkle conceals so much that even trained eyes cannot distinguish IF from grades several steps below.

Shape by shape guidance, including face-up size tables and what to demand on each certificate, lives in our shape guides.

An Honest Word
An Internally Flawless diamond is a fact you own, not a look you wear.

Nobody at the dinner party can see the difference between IF and VS1. You will know, the certificate will say so, and for some buyers that is precisely the point. We will find you a magnificent IF stone if that is your point too. We will also tell you, before you pay for it, that the eye stopped being able to follow the scale four grades lower.

91.4
ROSI™ Score
Know exactly what a diamond is worth before you buy it.

Found a diamond you are considering, here or anywhere else? Send the GIA or IGI certificate number and our gemological team returns its ROSI™ Score and a read of where it sits in the current market. Complimentary, within minutes.

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Fair Market ReadSample · Live market data
$4,650This diamond sits here$5,400

Where stones of the same exact specifications are trading on the open market right now. You get a straight answer, even when the diamond is not ours.

Questions

IF Clarity Questions, Answered

Is an IF diamond worth it?
It depends entirely on what you are buying. As rarity, yes: IF stones are a small fraction of gem diamonds and hold their scarcity. As visible beauty, no: a VS1 of equal cut looks identical to the naked eye. Buy IF because internal perfection matters to you as a fact, never because you expect to see the difference.
What is the difference between FL and IF?
Surface only. A Flawless diamond has neither inclusions nor blemishes at 10x magnification; an Internally Flawless diamond has no inclusions but carries insignificant surface marks, usually from polishing. Internally the two are equivalent, and no unaided eye can tell them apart.
Is IF clarity good for an emerald cut?
It is the grade step cuts flatter most. Emerald and asscher cuts have long open facets that display the interior of the stone plainly, so a genuinely empty interior reads as remarkable transparency. If you want an IF stone to visibly justify itself, set it in a step cut.
What should I check on an IF certificate?
Cut, proportions, and fluorescence, because clarity is settled. With clarity at the ceiling, the stone's beauty is decided entirely by how well it was cut. An IF grade with mediocre proportions is a rare stone that performs like an ordinary one.
Talk to a Jeweler

Considering an IF? Have a gemologist read it first.

John Anderson, our Lead Gemologist, reviews IF certificates and stone videos for clients every day. Send him any diamond you are considering and he will tell you what the certificate proves, what it cannot, and what your eye will actually see. The consultation is complimentary and there is no obligation.

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