Moissanite Colour & Clarity Grades Explained (And Which to Choose)

Heart Moissanite Halo Ring

£127.99

Moissanite Teardrop Pendant Necklace

£248.99

Square Moissanite Stud Earrings

£100.99

Emerald Cut Moissanite Drop Earrings

£214.99

Graded moissanite, set in sterling silver — each product page lists its exact specification

Start shopping for moissanite and you'll quickly run into a wall of letters and abbreviations: D-E-F, near-colourless, VVS1, GH colour, 0.5ct. It looks a lot like diamond grading — and it borrows the same language — but the advice for moissanite is genuinely different, and knowing that difference can save you money and stop you paying for a grade you don't need.

Here's the honest, plain-English version. Moissanite is graded on colour, clarity, cut and carat, just like a diamond, but two of those four barely matter for moissanite, one matters more than people realise, and the way size is described has a quirk worth understanding before you buy. By the end of this guide you'll know exactly what to look for on a product page, which grade to choose for your setting and skin tone, and where it's simply not worth spending more. As a brand that sells moissanite, we'd rather you understood this than overpaid for initials you didn't need.

The short version

For most buyers: choose colourless (D-E-F) moissanite if you want the whitest look, don't worry about clarity because quality moissanite is already eye-clean, and spend your attention on cut, which is what actually determines the sparkle. Size is described in millimetres and in “carat equivalent” rather than true carat weight — more on that below. Now the detail.

Moissanite is graded like a diamond — with two key differences

Moissanite grading uses the familiar “four Cs” framework — colour, clarity, cut and carat — the same system explained in our guide to the 4Cs of diamonds. The two big differences are that moissanite is lab-created, so its clarity is consistently very high and rarely a concern, and moissanite is a different stone (silicon carbide) that is slightly less dense than diamond, which changes how size is measured. Keep those two facts in mind and the rest falls into place.

Colour grades explained

Moissanite colour is graded on the same D-to-Z scale diamonds use, where D is completely colourless and the further down the alphabet you go, the warmer (more yellow or grey) the stone looks. In practice, moissanite is sold in three broad tiers:

Which colour should you choose?

The good news is that modern, good-quality moissanite is reliably colourless (D-E-F) at a low price, so there's rarely a reason to settle for a tinted stone. A couple of practical pointers: if your setting is a white metal — platinum, white gold or rhodium-plated sterling silver — go colourless, because a white metal shows up any warmth in the stone. If your setting is yellow or rose gold, near-colourless (G-H-I) can look perfectly white against the warm metal and may stretch your budget further. One quirk in moissanite's favour: because it throws so much fire (more on cut below), a little warmth is often masked by the rainbow flashes, so faint tints are less obvious than they would be in a diamond.

Clarity grades explained (and why they rarely matter here)

Clarity measures the tiny internal marks, or inclusions, inside a stone. Diamonds run the full range from flawless to visibly included, which is why clarity hugely affects a diamond's price. Moissanite is different: because it is grown in controlled laboratory conditions, quality moissanite is typically VVS — “very, very slightly included” — or better, which means it is eye-clean: no inclusions you could ever see without magnification. You'll see grades like VVS1 on listings (our Heart Moissanite Halo Ring is a 0.5ct VVS1 stone, for example).

The honest takeaway: don't spend time agonising over moissanite clarity. It's already excellent across the board, so unlike with diamonds, clarity isn't where the meaningful decisions — or price differences — lie. Check that a piece is VVS and move on.

Cut — the grade that actually decides the sparkle

If clarity is the grade people overthink, cut is the one they underrate. Cut refers to how precisely the stone's facets are shaped and angled, and it is the single biggest factor in how brightly a moissanite shines, sparkles and throws fire. A beautifully cut stone in a modest colour grade will outshine a poorly cut stone with a better colour grade every time.

Moissanite has a natural advantage here: it has more than double the fire (that rainbow-colour sparkle) of a diamond, so a well-cut moissanite is spectacularly lively. Precision-cut shapes — like the geometry on our Square Moissanite Stud Earrings or the elongated Emerald Cut Moissanite Drops — are designed to make the most of that fire. When you're comparing pieces, prioritise cut and brilliance over chasing the last colour grade.

Carat, millimetres and “carat equivalent” — the size quirk

This is the part unique to moissanite, so it's worth a moment. Carat is a unit of weight, not size. Moissanite is about 15% less dense than diamond, which means a moissanite and a diamond of the same physical size (measured in millimetres) will have different carat weights — the moissanite weighs a little less.

To avoid confusion, moissanite is usually described by its millimetre size and by its “carat equivalent” (sometimes written DEW, diamond equivalent weight) — meaning “this stone is the same size as a diamond of X carats.” So when a moissanite is sold as “1 carat,” it almost always means “the size of a 1-carat diamond,” which is what you actually care about visually. Here's a rough guide for round stones:

(These are approximate and apply to round brilliant cuts; fancy shapes vary.) The practical tip: when buying moissanite online, trust the millimetre measurement for how big a stone will actually look on your hand.

So which grade should you actually buy?

Putting it together, a sensible default for most people is straightforward: choose a colourless (D-E-F) VVS moissanite with a good cut, in the millimetre size that suits the piece and your hand. Pay for colour and cut; don't overpay for clarity you can't see; and don't be dazzled by a big “carat” number without checking the millimetre size behind it. If your setting is warm-toned gold, near-colourless can be a smart, money-saving choice that still looks white.

Common misconceptions

“Higher clarity means much more sparkle”

Not for moissanite. Sparkle comes from cut, not clarity, and moissanite clarity is uniformly high already. A VVS1 and a VVS2 stone will look identical to the eye.

“I should always buy the biggest carat I can afford”

Because moissanite is affordable, it's tempting to chase size — but proportion matters more than a headline number, and “carat” here means size-equivalent, not weight. Choose the millimetre size that flatters the piece and your hand rather than the biggest figure.

“Colourless is always better”

Whiter suits white metals, but against yellow or rose gold a near-colourless stone can look every bit as white while costing less. “Best” depends on the setting.

How to read a Micoryan product page

We state the specification — stone, cut, carat equivalent and clarity where relevant — on each moissanite product page, and all our moissanite is set in solid 925 sterling silver, much of it rhodium-plated for a bright white finish. So you never have to guess: check the millimetre or carat-equivalent size for scale, confirm the clarity (you'll see VVS), and choose the shape and setting you love. The grades are there to inform you, not to intimidate you.

The bottom line

Moissanite is graded on colour, clarity, cut and carat like a diamond, but the smart-buyer advice is different: clarity is consistently high so it rarely matters, cut is what truly drives the sparkle, colour is worth choosing to match your metal (colourless for white metals, near-colourless is fine for gold), and “carat” usually means size-equivalent rather than true weight — so trust the millimetres. Get those right and you'll buy a stone that looks brilliant for less, without paying for initials you didn't need.

Browse the full Moissanite Collection to see graded, sterling-silver-set pieces — each with its specification listed.

Related reading:
Moissanite Engagement Rings UK: The Complete Buyer's Guide
Moissanite vs Diamond: An Honest Comparison
How to Care for Moissanite Jewellery: Does It Get Cloudy?