Moissanite 101
Why Two Moissanites Cost Different Amounts
There is no grading scale to anchor the price β so the number is built from things you have to ask about.
Written by the Mapple Gems workshop, Surat Β· Updated 16 October 2026
Short answer
Four things drive the price: size in millimetres, cut quality, brand name, and what else is in the ring. Only the first is stated openly, the second is invisible in photographs, the third is marketing, and the fourth β metal weight, accent stones, setting labour β is frequently most of the total. Because no laboratory grades moissanite, there is no colour or clarity scale to compare against, so a price is only meaningful next to a full specification.
With diamond, a report gives you an anchor: two stones with the same four grades should cost roughly the same, and a large gap needs explaining. Moissanite has no such anchor, and that changes how you have to shop.
No laboratory grades moissanite for cut, colour or clarity β so any grades you see attached to one are the sellerβs own assessment, and two sellers using the same letters may not mean the same thing. This is not a scandal; it is simply how the material is sold. But it removes the comparison shortcut people are used to. A stone described as βD colour VVSβ by one seller and βcolourless, eye-cleanβ by another may be identical or may not, and no independent document exists to settle it. What does exist, and what is genuinely comparable, are measurements. Millimetres and depth are physical facts. Whether a stone matches the standard dimensions for its stated weight is checkable. Whether it looks alive through a rotating video in an ordinary room is observable. So the price question becomes a specification question: ask for the millimetres, the depth, a handheld video in normal indoor light, and the gram weight of the ring around it. Two quotes with those figures attached can be compared properly. Two quotes with letters attached cannot be compared at all.
What you are actually paying for
| Factor | Effect on price | Can you verify it? |
|---|---|---|
| Size in mm | Large β rises steeply | Yes |
| Cut quality | Large | Only on video |
| Brand name | Can be large | No β it is marketing |
| Metal weight and karat | Often most of the total | Yes β grams |
| Accent stones and setting | Large β labour, not stones | Yes β count and size |
| βGradesβ | Used to justify price | No standard exists |
The fourth and fifth rows are the ones people overlook. On a moissanite ring the stone is frequently not the expensive part β the gold and the bench hours are. Which is why comparing two rings by their stone descriptions alone tells you almost nothing about why one costs more.
Size, and why it rises so steeply
A stone is three-dimensional, so going up in diameter increases volume disproportionately β and cutting a larger stone well takes more material and more time. That is real and it is the honest part of the price curve.
What matters practically is that apparent size is millimetres, not carats. Moissanite is slightly less dense than diamond, so a moissanite of a given millimetre size weighs a little less than a diamond of the same dimensions β which is why reputable sellers describe moissanite in millimetres or βdiamond equivalent weightβ rather than carats.
Ask for the actual millimetres every time. A stone sold as β1 caratβ should be around 6.5Β mm for a round; if it measures noticeably larger, it has been cut shallow to spread, which returns less light.
Cut quality, the invisible one
The biggest genuine difference between two similarly described stones, and the hardest to see. No laboratory grades cut on moissanite at all, so there is no shortcut β the assessment is entirely yours.
What a well-cut stone shows on a rotating video in ordinary indoor light: crisp facet junctions, even light return across the whole face, no permanently dark zone that stays put as the stone turns, and a symmetrical outline. What a poorly cut one shows: a flat lifeless centre, or a stone that only comes alive under a spotlight.
And on brand names and hearts-and-arrows claims β these are marketing terms, not certified standards. A branded stone may well be excellently cut; the point is that the name is not the evidence. The video is.
How to compare two quotes properly
- Centre stone millimetres and depth β not carats, not grades.
- Metal and fineness number, and finished gram weight β the one line you can check against a public gold price.
- Accent count and size, since melee is never individually certified in any material and the cost there is setting labour.
- Shank width and thickness at the base β 1.8Β mm minimum for daily wear.
- A rotating video in a normal room, not a lightbox.
Ask both sellers for the same five and let the blank cells do the comparing. A cheaper ring that turns out to have a 1.4Β mm shank and no video is not cheaper; it is a different product.
Where the money is best spent
Our honest view, and it runs against the usual upsell. Because moissanite is inexpensive relative to the ring around it, the marginal money goes further in the metal than in the stone.
Going from a 1.5Β mm shank to 1.8Β mm costs very little and adds a decade before a reshank. A properly made head with a prong over every corner costs a little more and prevents the failure that loses stones. An open gallery costs nothing and lets the piece be cleaned for fifty years.
Whereas going up half a millimetre in stone size is barely visible on a hand and is where most upgrade budgets quietly go. If you want visible impact for the money, the metal choices are the better buy.
Keep reading
Frequently asked questions
Why do moissanite prices vary so much?
Size in millimetres and cut quality are the genuine drivers; brand names add cost without independent verification; and metal weight plus setting labour are frequently most of the total. With no grading scale to anchor comparisons, a price is only meaningful beside a full specification.
Are moissanite colour and clarity grades reliable?
They are seller assessments rather than certified facts, because no laboratory grades moissanite. Two sellers using the same letters may not mean the same thing, and no independent document exists to settle it. Measurements and video are what compare.
Is a branded moissanite worth more?
A branded stone may be excellently cut, but the name is not the evidence β brand names and hearts-and-arrows claims are marketing terms rather than certified standards. Judge it on a rotating video in ordinary indoor light instead.
Where should I spend extra on a moissanite ring?
On the metal. Going from a 1.5Β mm to a 1.8Β mm shank costs little and adds years before a reshank; a head with a prong over every corner prevents the failure that loses stones. Half a millimetre more stone is barely visible on a hand.
Ask any seller for millimetres, grams and a video.
Three facts that can be checked β and the only honest way to compare two moissanite prices.
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