Explore our easy Moissanite vs Natural Diamond Size Chart to compare stones side by side. First, check the carat weight. Then, look at the millimeter size. Next, see how each stone looks in real life. As a result, this chart helps you choose the right size for engagement rings and custom jewelry with confidence.
Round
Cushion
Oval
Emerald
Radiant
Pear
Marquise
Princess
Asscher
Round Cut Moissanite and Natural Diamond Size Chart - When comparing round cut moissanite with natural diamonds, it’s important to understand that moissanite has a lower density, so it weighs less even when the visible size looks the same. That’s why we focus on millimeter (mm) measurements to ensure accurate size comparison and help you confidently choose the perfect stone.
| Size (mm) | Moissanite Average Weight | Natural Diamond Equivalent Weight |
|---|---|---|
| 3.0 | 0.11 | 0.11 |
| 3.5 | 0.17 | 0.18 |
| 4.0 | 0.24 | 0.25 |
| 4.5 | 0.31 | 0.33 |
| 5.0 | 0.48 | 0.50 |
| 5.5 | 0.56 | 0.60 |
| 6.0 | 0.75 | 0.80 |
| 6.5 | 1.00 | 1.10 |
| 7.0 | 1.20 | 1.30 |
| 7.5 | 1.50 | 1.67 |
| 8.0 | 1.95 | 2.00 |
| 8.5 | 2.44 | 2.50 |
| 9.0 | 2.68 | 2.75 |
| 9.5 | 3.20 | 3.50 |
| 10.0 | 3.80 | 3.90 |
| 10.5 | 4.20 | 4.40 |
| 11.0 | 4.70 | 4.85 |
| 11.5 | 5.70 | 5.85 |
| 12.0 | 6.10 | 6.50 |
| 12.5 | 6.70 | 7.0 |
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Cushion Cut Moissanite and Natural Diamond Size Chart - While cushion cut moissanite and natural diamonds may appear identical in dimensions, moissanite naturally has a lighter density, meaning it weighs less than a diamond of equal size. For this reason, we rely on precise millimeter (mm) measurements to provide an accurate side-by-side size guide and help you select the right stone with confidence.
| Size (mm) | Moissanite Average Weight | Natural Diamond Equivalent Weight |
|---|---|---|
| 3.0 | 0.12 | 0.13 |
| 3.5 | 0.19 | 0.22 |
| 4.0 | 0.30 | 0.33 |
| 4.5 | 0.42 | 0.50 |
| 5.0 | 0.57 | 0.60 |
| 5.5 | 0.75 | 0.80 |
| 6.0 | 0.96 | 1.10 |
| 6.5 | 1.21 | 1.30 |
| 7.0 | 1.49 | 1.70 |
| 7.5 | 1.80 | 2.00 |
| 8.0 | 2.15 | 2.40 |
| 8.5 | 2.54 | 2.80 |
| 9.0 | 2.98 | 3.00 |
| 9.5 | 3.74 | 4.20 |
| 10.0 | 4.18 | 5.02 |
| 10.5 | 4.99 | 5.81 |
| 11.0 | 5.79 | 6.68 |
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Oval Cut Moissanite and Natural Diamond Size Chart - When evaluating oval cut moissanite against diamonds, it’s essential to note that moissanite has a lighter density, meaning it weighs less than a diamond of identical dimensions. For accurate comparison, we rely on millimeter (mm) measurements rather than carat weight, helping you clearly understand size differences and select your ideal center stone with confidence.
Emerald Cut Moissanite and Natural Diamond Size Chart - When evaluating emerald cut moissanite beside a diamond of identical dimensions, you’ll notice moissanite weighs less due to its lower density. Because carat reflects weight rather than appearance, we rely on millimeter (mm) measurements for precise size comparison. Use this chart to clearly match visual size with accurate stone weight equivalents.
Radiant Cut Moissanite and Natural Diamond Size Chart - When evaluating radiant cut moissanite alongside a diamond of similar face-up dimensions, you’ll notice that moissanite weighs less because of its different density. For a precise and realistic size comparison, we rely on millimeter (mm) measurements instead of carat weight, helping you select the right stone with clarity and confidence.
Pear Cut Moissanite and Natural Diamond Size Chart - When comparing pear cut moissanite to Natural diamonds, remember that moissanite is lighter in density, meaning it weighs less than a diamond of the same visible size. For a more precise comparison, we rely on millimeter (mm) dimensions rather than carat weight, helping you clearly match pear-shaped stones to their diamond size equivalents.
Marquise Cut Moissanite and Natural Diamond Size Chart - While marquise moissanite and natural diamonds may appear similar in length and width, their carat weight differs due to density variations. Moissanite is lighter, even at the same visible size. For precise comparison, we rely on millimeter (mm) dimensions so you can accurately match proportions and select your ideal center stone with confidence.
Princess Cut Moissanite and Natural Diamond Size Chart - When comparing princess cut moissanite to natural diamonds, remember that both stones may appear identical in dimensions, yet moissanite typically weighs less due to its different density. For a precise and transparent comparison, we rely on millimeter (mm) measurements, making it easier for you to select the right size with complete confidence.
Asscher Cut Moissanite and Natural Diamond Size Chart - When comparing Asscher cut moissanite to natural diamonds, keep in mind that moissanite features a different density, meaning it weighs less than a diamond of the same face-up dimensions. For accurate selection, we rely on millimeter (mm) measurements rather than carat weight, helping you match visual size precisely and choose your ideal gemstone with confidence.
Before you buy, understand the key differences in the size chart. This helps you compare shine, strength, and price with ease. In addition, it makes your choice simple. As a result, you can pick the right stone with more confidence and peace of mind.
Briza Jewel began with natural diamond cutting. Later, we moved to lab-grown diamonds and moissanite. Because of this, our size chart supports ethical choices. In addition, we follow standards from the International Gemological Institute. So, our stones are conflict-free and eco-friendly. We also support tree planting and local programs.
Our team checks every stone for the size chart. First, they measure the shape and weight. Then, they improve the cut for better shine. After that, they polish each stone by hand. As a result, each moissanite and lab-grown diamond shows bright sparkle and balance.
Our size chart supports smart and ethical buying. In addition, lab-grown diamonds and moissanite are eco-friendly options. Because they need no heavy mining, they reduce land damage and carbon impact. So, our jewelry stays conflict-free and sustainable.
Both stones in our size chart are strong and durable. For example, lab-grown diamonds rank 10/10 on the Mohs scale. Moissanite ranks 9.25 to 9.50. So, both resist scratches very well. However, a strong hit may cause a chip. Even so, their crystal structure helps prevent clean breaks.
Yes, moissanite can look slightly bigger than a diamond with the same carat weight. This happens because moissanite has lower density. So, it keeps a similar width but weighs less. As a result, two stones with equal carat weight may not look the same size. Therefore, always compare millimeter (mm) size first for better accuracy.
Carat measures weight, not visible size. Because moissanite and diamonds have different density, equal carat weight may look different. So, check the millimeter size on the chart. This helps you understand how large the stone will look in a ring.
Yes, in many cases you can replace a diamond with moissanite. However, exact sizing is important. You must match the millimeter size for a secure fit. Even a small difference can affect the setting. So, review the size chart carefully.
For most sizes, the difference is small. Many people do not notice it in daily wear. However, checking millimeter size ensures the final look feels balanced and well shaped on your hand.
You can review official standards at the International Gemological Institute. They follow global diamond grading rules. Because of this, their guidelines support the measurements used in our size chart.
