Almost every moissanite you will see for sale today is described the same way: "D–F colour, VVS1 clarity." The shorthand is borrowed from diamond grading, and unless you already speak that language it tells you very little. This guide explains what moissanite colour grades and clarity actually mean, how the grades are assigned — and by whom, which surprises most buyers — what you will genuinely notice on your hand, and where a premium is not worth paying.
How is moissanite colour graded?
Moissanite is described using the alphabetical colour scale the GIA developed for diamonds, which runs from D (fully colourless) down through Z (noticeably tinted). D–F is the "colourless" band, G–I is "near-colourless," and from J onward a faint warm tint becomes visible. Most modern moissanite is grown and sold in the D–F range.
Here is the detail most listings leave out: the GIA itself does not issue grading reports for moissanite. Those D–F labels are assigned by growers and sellers using the diamond scale as a reference — not by an independent laboratory of the GIA's standing. That does not make the grades meaningless; well-made modern moissanite genuinely is colourless. It does mean a colour grade on moissanite is a manufacturer's description rather than a third-party verdict, and it should never be the reason you pay dramatically more for one letter over another.
It was not always this way. Early moissanite carried a noticeable yellow-green cast, and some of the stone's lingering reputation dates from that era. The crystal-growing process has since matured, and colourless material is now the norm rather than the exception.
What does D–F colour actually look like?
In practice: colourless. Set side by side, a D and an F moissanite are close to indistinguishable to an untrained eye. Whatever difference exists tends to hide in the pavilion — the underside of the stone — under particular lighting, not in the face-up view you live with every day.
One thing genuinely confuses buyers here. The rainbow flashes moissanite throws are not a colour tint. Moissanite's dispersion — its ability to split white light into spectral colours — measures 0.104, more than double a diamond's 0.044. Those coloured flashes are fire, an optical property of the crystal, and a D-colour stone produces them just as readily as a lower-graded one. If you see rainbows, you are watching dispersion at work, not a flaw and not a tint.
Two things shape perceived colour more than the letter itself. Size: larger stones show body colour more readily, so the grade matters slightly more above a carat or two. And metal: a white setting flatters a colourless stone. In bright 925 sterling silver — a cool white metal that frames the stone rather than tinting it — a D–F moissanite reads crisp and cold-white.
What does VVS1 clarity mean for moissanite?
VVS1 stands for "very, very slightly included (1)": any inclusions are so small that even a trained grader struggles to find them under 10× magnification. To the naked eye, a VVS1 stone is clean — no visible specks, clouds, or lines.
Nearly all jewellery-grade moissanite is sold at VVS clarity, and the reason is simply that it is lab-created. Moissanite is silicon carbide grown in controlled conditions; its typical inclusions are microscopic needle-like traces left by crystal growth, and cutters orient the rough to avoid anything larger. The honest consequence: clarity is rarely a meaningful point of difference between moissanite stones, and it is not a reason to pay more. If two stones are both described as VVS1, judge the cut instead.
Does moissanite get cloudy or lose its colour over time?
No. Silicon carbide measures 9.25 on the Mohs hardness scale and is chemically stable: it does not fade, yellow, or turn cloudy with age. When a moissanite ring starts to look dull, the cause is almost always a film of skin oil, soap, or lotion sitting on the surface — the same film that dulls any stone. Warm water, a drop of mild dish soap, and a soft brush will bring it back.
What is actually worth paying attention to?
- Cut quality over colour letters. With a refractive index of 2.65–2.69, moissanite handles light unusually well, and the cut decides whether that reads as lively brilliance or as the exaggerated "disco ball" effect some people dislike. A well-cut F stone will outshine a poorly cut D every time.
- Shape, honestly chosen. Fire is most visible in larger brilliant cuts. If you prefer whiter, quieter sparkle, smaller stones and step cuts such as the emerald cut temper the rainbow effect.
- Scepticism about certificates. A moissanite "certificate" chiefly confirms that the stone is moissanite and records its measurements. It is not the equivalent of a GIA diamond report, and it should not be the justification for a higher price.
- The setting you live with. Metal, finish, and the security of the prong work shape your daily experience of the piece far more than one step of colour grade ever will.
The short version
Modern moissanite at D–F colour and VVS1 clarity is, for practical purposes, a colourless, eye-clean stone — and paying a large premium to move within that band buys you very little you can actually see. What you can see is cut, proportion, and the setting around it. Spend your attention there.
Maison Noctaura describes its stones the way the product pages do: lab-created moissanite, near-colourless and eye-clean, uncertified. We do not publish a D–F or VVS1 grade for our own stock, because no independent laboratory has graded it and a grower's word is not a grade. They are set in solid 925 sterling silver with a platinum finish over the silver. Our materials page covers the substance plainly, and the pieces themselves are in the collection whenever you feel like looking.
The coloured stones on our shelf
Not every stone we set is near-colourless. The Sunset Sovereign Ring is a warm yellow moissanite, cut round brilliant. The Lucky Charm Clover Ring is cut from green. The Azure Vigil Drops hold a blue stone in a cushion-cut halo, and the Lucky Clover Set puts a clover station on a necklace, a ring and a pair of studs. They and the rest are gathered in Coloured Moissanite — the stones are coloured, the metal is always 925 sterling with a platinum finish.
