Moissanite Carat Size Guide — How to Choose the Right Stone Size in India
Moissanite Carat
Size Guide — How to
Choose the Right Stone Size.
Carat weight, millimetre dimensions, cut comparisons, and finger-type guidance — everything you need to choose the right stone size before you buy. No guesswork.
Carat weight vs stone dimensions — what actually matters?
Carat is a measure of weight, not size. Two stones of the same carat weight can look very different on the finger depending on their cut — an oval and a round of equal weight have completely different visual footprints. When choosing a moissanite ring, stone dimensions in millimetres are more useful than carat weight for understanding how the stone will actually look.
That said, carat weight is the standard for describing and pricing moissanite. This guide gives you both — so you can shop with complete clarity.
"The right stone carat is not the biggest you can afford. It is the one that suits your finger, your lifestyle, and the way you actually wear jewellery every day."
The complete moissanite stone size chart — all cuts
Read stone size by millimetre — it is the most reliable measure of how a stone actually looks on the hand. For every size, two carat figures matter: the Moissanite Weight (what the stone genuinely weighs) and the Diamond Equivalent Weight (DEW) — the carat a diamond of the same dimensions would weigh. Because moissanite is about 10% less dense than diamond, its true weight always runs a little below its DEW. Moissanite is conventionally described by DEW, so that is the figure to compare against a diamond carat. Dimensions below follow the Charles & Colvard moissanite size standard — the original moissanite maker's reference chart.
| MM Size | Moissanite Weight | Diamond Equivalent (DEW) |
|---|---|---|
| Round Brilliant 58 facets | ||
| 4.5mm | 0.29ct | 0.33ct |
| 5.0mm | 0.41ct | 0.50ct |
| 5.5mm | 0.54ct | 0.60ct |
| 6.0mm | 0.68ct | 0.80ct |
| 6.5mm ✦ | 0.88ct | 1.00ct |
| 7.0mm ✦ | 1.10ct | 1.20ct |
| 7.5mm | 1.35ct | 1.50ct |
| 8.0mm | 1.60ct | 1.90ct |
| 8.5mm | 1.90ct | 2.20ct |
| 9.0mm | 2.26ct | 2.70ct |
| 9.5mm | 2.75ct | 3.10ct |
| Cushion 62 facets | ||
| 4.5mm | 0.42ct | 0.50ct |
| 5.0mm | 0.57ct | 0.60ct |
| 5.5mm | 0.75ct | 0.80ct |
| 6.0mm ✦ | 0.96ct | 1.10ct |
| 6.5mm | 1.21ct | 1.30ct |
| 7.0mm | 1.49ct | 1.70ct |
| 7.5mm | 1.80ct | 2.00ct |
| 8.0mm | 2.15ct | 2.40ct |
| 8.5mm | 2.54ct | 2.80ct |
| Oval 58 facets | ||
| 5×3mm | 0.23ct | 0.26ct |
| 6×4mm | 0.43ct | 0.50ct |
| 7×5mm ✦ | 0.84ct | 0.90ct |
| 8×6mm | 1.33ct | 1.50ct |
| 9×7mm | 1.91ct | 2.10ct |
| 10×8mm | 2.72ct | 3.00ct |
| Pear 72 facets | ||
| 5×3mm | 0.20ct | 0.21ct |
| 6×4mm | 0.39ct | 0.43ct |
| 7×5mm | 0.69ct | 0.77ct |
| 8×5mm ✦ | 0.85ct | 0.94ct |
| 9×6mm | 1.33ct | 1.50ct |
| 10×7mm | 1.93ct | 2.10ct |
| 12×8mm | 3.09ct | 3.57ct |
| Emerald 46 facets | ||
| 5×3mm | 0.27ct | 0.30ct |
| 6×4mm | 0.50ct | 0.58ct |
| 7×5mm ✦ | 0.98ct | 1.05ct |
| 8×6mm | 1.55ct | 1.75ct |
| 9×7mm | 2.23ct | 2.45ct |
| 10×8mm | 3.17ct | 3.50ct |
| Princess square brilliant · 66 facets | ||
| 4.5mm | 0.51ct | 0.60ct |
| 5.0mm | 0.71ct | 0.80ct |
| 5.5mm ✦ | 0.91ct | 1.00ct |
| 6.0mm | 1.18ct | 1.30ct |
| 6.5mm | 1.50ct | 1.70ct |
| 7.0mm | 1.88ct | 2.10ct |
| 7.5mm | 2.28ct | 2.50ct |
| 8.0mm | 2.78ct | 3.10ct |
| Marquise 59 facets | ||
| 7×3.5mm | 0.32ct | 0.35ct |
| 8×4mm | 0.47ct | 0.50ct |
| 9×4.5mm | 0.67ct | 0.70ct |
| 10×5mm ✦ | 0.90ct | 1.00ct |
| 11×5.5mm | 1.26ct | 1.40ct |
| 12×6mm | 1.58ct | 1.80ct |
| 13×6.5mm | 1.98ct | 2.20ct |
| 14×7mm | 2.48ct | 2.80ct |
| Heart 57 facets | ||
| 5.0mm | 0.42ct | 0.50ct |
| 5.5mm | 0.54ct | 0.60ct |
| 6.0mm | 0.70ct | 0.80ct |
| 6.5mm ✦ | 0.86ct | 1.00ct |
| 7.0mm | 1.10ct | 1.20ct |
| 7.5mm | 1.32ct | 1.50ct |
| 8.0mm | 1.61ct | 1.80ct |
| 8.5mm | 1.99ct | 2.20ct |
✦ marks the ≈1.0ct (DEW) reference size in each cut. Moissanite Weight is the stone's true weight; DEW is the comparable diamond carat. Figures follow the Charles & Colvard size standard and are approximate. Scroll horizontally on mobile to see all columns.
Which stone carat is right for you?
The honest answer depends on three things: your finger width, your daily lifestyle, and whether you want the ring to make a statement or simply be always present. Here is a practical breakdown by stone carat range.
Barely-there sparkle. Ideal for stacking with other rings or for women who prefer their jewellery subtle. Best on smaller fingers where a larger stone can look disproportionate on the finger.
Noticeable but not overwhelming. The size that most women who prefer everyday jewellery land on. Comfortable for all-day wear, suits most finger widths, visible sparkle without being impractical.
The most requested size at IDHANI. Meaningful presence on the hand without crossing into statement territory. The size that looks unmistakably intentional — worn confidently with sarees, office wear, and everything between.
Maximum fire and presence for everyday use. At 1.5ct, moissanite's rainbow fire becomes genuinely dramatic. Best on medium to wider fingers. The size that earns comments at every gathering.
Unmistakably a statement piece. Not for everyone's daily lifestyle, but for those who love bold jewellery, moissanite at this size produces extraordinary fire that turns heads in any lighting condition.
For eternity bands and pavé bands, total carat weight is spread across multiple stones. A 1.0ct half eternity has five 0.2ct stones. The visual effect is continuous sparkle across the band — evaluate by the number of stones and band width, not total ct alone.
Choosing stone carat by finger type
The same stone carat can look completely different on different fingers. Here is a quick reference guide.
Slim fingers carry most sizes well. Ovals elongate further. Avoid very wide bands which can shorten the visual length of the finger.
Elongated cuts create a lengthening effect on shorter fingers. Avoid round cuts set in very wide bands — they can make the finger appear shorter. A 1.2ct oval is particularly flattering.
Average-width fingers are the most versatile canvas. Round solitaires suit particularly well. The 1.2ct round is the universal recommendation for this finger type.
Wider fingers need a larger stone to maintain proportion. A 1.0ct stone on a wide finger can look small regardless of how beautiful it is. Go up in carat — a 1.5ct or larger will look proportionate and striking.
Frequently asked questions
At IDHANI, 1.2ct (7.0mm round, DEW) is consistently the most purchased size. It offers meaningful presence on the hand, suits most finger types, and sits comfortably in the everyday-wear range. For those who prefer something more subtle, 1.0ct (6.5mm) is the second most popular choice.
Yes and no. A larger stone has more surface area, which means more facets catching light. But the quality of sparkle — how brilliantly and colourfully the stone fires — depends more on the cut quality and the stone's refractive index than on its size. An excellent-cut 1.0ct moissanite will outperform a poor-cut 2.0ct every time. Every IDHANI stone is cut to maximise fire regardless of size.
No. Carat measures weight, and moissanite is about 10% less dense than diamond (3.21 vs 3.52 g/cm³) — so at the same physical size, a moissanite weighs less than a diamond. A 6.5mm round diamond weighs about 1.00ct; a 6.5mm round moissanite of identical dimensions weighs about 0.88ct. To keep comparisons simple, moissanite is described by its Diamond Equivalent Weight (DEW) — the carat a diamond of the same size would weigh. So a "1.0ct DEW" moissanite measures 6.5mm and looks identical on the hand to a 1.0ct diamond, even though its true weight is closer to 0.88ct. The practical takeaway: compare moissanite to diamond by millimetre or by DEW — not by raw weight.
For mangalsutras, smaller stones are typically more appropriate — 0.2ct to 0.5ct for minimal designs, and up to 1.0ct for statement mangalsutras. The pendant hangs near the centre of the chest, so even a 0.5ct stone reads with significant presence. IDHANI's minimal mangalsutras are designed with this in mind.
The most accurate method: wrap a thin strip of paper around the base of your finger at its widest point (finger width changes through the day — measure in the afternoon when fingers are slightly larger). Mark where the paper overlaps. Measure the length in millimetres and divide by 3.14 to get the diameter. Compare to the international ring size chart on our Ring Size Guide page.
"For most Indian women buying their first moissanite ring — start at 1.0ct to 1.2ct round. It is the size that feels meaningful without being impractical, and the size that IDHANI buyers return to most often."
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