Moissanite vs. Diamond Size Chart
Master Guide: All Moissanite Cuts & Shapes
Explore our precision-crafted, GRA Certified Moissanite collection. From timeless Rounds to sophisticated Asschers, find the perfect D-Colorless VVS1 stone for your vision.
The Millimeter Advantage
Because Moissanite is 10% to 15% lighter than diamond, we prioritize Millimeter (mm) measurements over Carat weight. This ensures your stone has the exact visual presence and finger coverage you desire. Our Diamond Equivalent Weight (DEW) allows for easy comparison with traditional diamond sizes.
Round Brilliant Cut
The ultimate classic with 58 facets for maximum brilliance and fire.
| Size (mm) | DEW (ct) |
|---|---|
| 6.5 mm | 1.00 ct |
| 8.0 mm | 2.00 ct |
Cushion Cut
Soft, rounded edges and large facets for a romantic, vintage glow.
| Size (mm) | DEW (ct) |
|---|---|
| 6.5 mm | 1.50 ct |
| 8.0 mm | 2.50 ct |
Oval Cut
Elongated brilliance that slims the finger and appears larger than rounds.
| Size (mm) | DEW (ct) |
|---|---|
| 7×5 mm | 1.00 ct |
| 9×7 mm | 2.00 ct |
Emerald Cut
Step-cut facets creating a sophisticated “hall-of-mirrors” effect.
| Size (mm) | DEW (ct) |
|---|---|
| 7×5 mm | 1.00 ct |
| 8×6 mm | 1.75 ct |
Radiant Cut
Combines emerald elegance with the intense fire of a brilliant cut.
| Size (mm) | DEW (ct) |
|---|---|
| 7×5 mm | 1.25 ct |
| 8×6 mm | 2.00 ct |
Pear Cut
A unique teardrop shape representing grace and individuality.
| Size (mm) | DEW (ct) |
|---|---|
| 8×5 mm | 1.00 ct |
| 10×7 mm | 2.30 ct |
Marquise Cut
Regal and elongated, maximizing face-up size for a bold statement.
| Size (mm) | DEW (ct) |
|---|---|
| 10×5 mm | 1.00 ct |
| 12×6 mm | 1.80 ct |
Princess Cut
Modern, square geometry with exceptional light return and vibrant sparkle.
| Size (mm) | DEW (ct) |
|---|---|
| 5.5 mm | 1.00 ct |
| 7.0 mm | 2.00 ct |
Asscher Cut
Vintage square step-cut with cropped corners for mesmerizing depth.
| Size (mm) | DEW (ct) |
|---|---|
| 6.5 mm | 1.50 ct |
| 8.0 mm | 3.00 ct |
Moissanite Selection: Frequently Asked Questions
Will my Moissanite lose its sparkle or turn cloudy?
No. High-quality Moissanite is a non-porous gemstone that never loses its brilliance or becomes cloudy over time. Its permanent sparkle is guaranteed by its high refractive index of 2.65-2.69.
Is Moissanite durable enough for an engagement ring?
Yes. Scoring 9.25 on the Mohs scale, Moissanite is the second hardest gemstone in the world after diamond. It is highly resistant to scratching, chipping, and daily wear.
What does GRA Certification verify?
GRA Certification provides an official report of the stone’s dimensions, color grade (D-Colorless), clarity (VVS1), and cut quality, ensuring your stone meets professional grading standards.
How do I clean my Moissanite jewelry?
A simple soak in lukewarm soapy water followed by a gentle brush with a soft toothbrush will restore its original fire. It is also safe for ultrasonic cleaners.