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5.5ct Cubic Zirconia (Radiant, 8.67×8.67mm, White) vs 5.5ct Moissanite (Radiant, 10.45×10.45mm, White)


Quick summary: When looked from above (face-up position), 5.5ct Moissanite (10.45×10.45mm, radiant cut) appears 45% larger than 5.5ct Cubic Zirconia (8.67×8.67mm, radiant cut). See below how they compare side-by-side on a ring and finger.

5.5ct Cubic Zirconia (radiant cut)
vs
5.5ct Moissanite (radiant cut)
white
 
white
8.67×8.67 mm 10.45×10.45 mm
actual size
Actual size of 5.5ct Cubic Zirconia (radiant cut, 8.67×8.67mm, White color)   Actual size of 5.5ct Moissanite (radiant cut, 10.45×10.45mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 5.5ct Cubic Zirconia (radiant cut, 8.67×8.67mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 5.5ct Moissanite (radiant cut, 10.45×10.45mm) 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
52% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5.5ct Cubic Zirconia Radiant (8.67×8.67mm, White) and 5.5ct Moissanite Radiant (10.45×10.45mm, 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.


5.5 Ct Cubic Zirconia (Radiant) 5.5 Ct Moissanite (Radiant)
8.67×8.67 mm vs 10.45×10.45 mm
71.41 mm²   103.74 mm²
Face-up size outline for 5.5ct Moissanite (10.45×10.45mm, radiant cut)
Face-up size outline for 5.5ct Cubic Zirconia (8.67×8.67mm, radiant cut)
5.5ct Cubic Zirconia Radiant (8.67×8.67mm)
5.5ct Moissanite Radiant (10.45×10.45mm)
Difference: 45% (32.33 mm²)
5.5ct Moissanite (Radiant, 10.45×10.45mm) has approx. 45% more face-up area than 5.5ct Cubic Zirconia (Radiant, 8.67×8.67mm).


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