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4ct Cubic Zirconia (Cushion, 7.83×7.83mm, White) vs 4ct Moissanite (Cushion, 9.45×9.45mm, White)


Quick summary: When looked from above (face-up position), 4ct Moissanite (9.45×9.45mm, cushion cut) appears 46% larger than 4ct Cubic Zirconia (7.83×7.83mm, cushion cut). See below how they compare side-by-side on a ring and finger.

4ct Cubic Zirconia (cushion cut)
vs
4ct Moissanite (cushion cut)
white
 
white
7.83×7.83 mm 9.45×9.45 mm
actual size
Actual size of 4ct Cubic Zirconia (cushion cut, 7.83×7.83mm, White color)   Actual size of 4ct Moissanite (cushion cut, 9.45×9.45mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 4ct Cubic Zirconia (cushion cut, 7.83×7.83mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 4ct Moissanite (cushion cut, 9.45×9.45mm) on a right ring and finger
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Finger coverage
47% vs 56%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Cubic Zirconia Cushion (7.83×7.83mm, White) and 4ct Moissanite Cushion (9.45×9.45mm, White) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Cubic Zirconia will face-up smaller than Moissanite for a given carat weight, because it has higher specific gravity (5.65 vs. 3.22 - this means it's "heavier" compared to Moissanite of the same size). Face-up size also depends heavily on the proportions of the cut.

Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


4 Ct Cubic Zirconia (Cushion) 4 Ct Moissanite (Cushion)
7.83×7.83 mm vs 9.45×9.45 mm
55.18 mm²   80.37 mm²
Face-up size outline for 4ct Moissanite (9.45×9.45mm, cushion cut)
Face-up size outline for 4ct Cubic Zirconia (7.83×7.83mm, cushion cut)
4ct Cubic Zirconia Cushion (7.83×7.83mm)
4ct Moissanite Cushion (9.45×9.45mm)
Difference: 46% (25.19 mm²)
4ct Moissanite (Cushion, 9.45×9.45mm) has approx. 46% more face-up area than 4ct Cubic Zirconia (Cushion, 7.83×7.83mm).


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