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8ct Cubic Zirconia (Cushion, 9.87×9.87mm, White) vs 8ct Moissanite (Cushion, 11.9×11.9mm, White)


Quick summary: When looked from above (face-up position), 8ct Moissanite (11.9×11.9mm, cushion cut) appears 45% larger than 8ct Cubic Zirconia (9.87×9.87mm, cushion cut). See below how they compare side-by-side on a ring and finger.

8ct Cubic Zirconia (cushion cut)
vs
 8ct Moissanite (cushion cut)
white
 
white
9.87×9.87 mm 11.9×11.9 mm
actual size
Actual size of 8ct Cubic Zirconia (cushion cut, 9.87×9.87mm, White color)   Actual size of 8ct Moissanite (cushion cut, 11.9×11.9mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 8ct Cubic Zirconia (cushion cut, 9.87×9.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 8ct Moissanite (cushion cut, 11.9×11.9mm) 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
 59% vs 71%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 8ct Cubic Zirconia Cushion (9.87×9.87mm, White) and 8ct Moissanite Cushion (11.9×11.9mm, 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.


8 Ct Cubic Zirconia (Cushion) 8 Ct Moissanite (Cushion)
9.87×9.87 mm vs 11.9×11.9 mm
87.68 mm²   127.45 mm²
Face-up size outline for 8ct Moissanite (11.9×11.9mm, cushion cut)
Face-up size outline for 8ct Cubic Zirconia (9.87×9.87mm, cushion cut)
8ct Cubic Zirconia Cushion (9.87×9.87mm)
8ct Moissanite Cushion (11.9×11.9mm)
Difference: 45% (39.77 mm²)
8ct Moissanite (Cushion, 11.9×11.9mm) has approx. 45% more face-up area than 8ct Cubic Zirconia (Cushion, 9.87×9.87mm).


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