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2.5ct Cubic Zirconia (Radiant, 6.66×6.66mm, White) vs 2.5ct Moissanite (Radiant, 8.04×8.04mm, White)


Quick summary: When looked from above (face-up position), 2.5ct Moissanite (8.04×8.04mm, radiant cut) appears 46% larger than 2.5ct Cubic Zirconia (6.66×6.66mm, radiant cut). See below how they compare side-by-side on a ring and finger.

2.5ct Cubic Zirconia (radiant cut)
vs
 2.5ct Moissanite (radiant cut)
white
 
white
6.66×6.66 mm 8.04×8.04 mm
actual size
Actual size of 2.5ct Cubic Zirconia (radiant cut, 6.66×6.66mm, White color)   Actual size of 2.5ct Moissanite (radiant cut, 8.04×8.04mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 2.5ct Cubic Zirconia (radiant cut, 6.66×6.66mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2.5ct Moissanite (radiant cut, 8.04×8.04mm) 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
 40% vs 48%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.5ct Cubic Zirconia Radiant (6.66×6.66mm, White) and 2.5ct Moissanite Radiant (8.04×8.04mm, 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.


2.5 Ct Cubic Zirconia (Radiant) 2.5 Ct Moissanite (Radiant)
6.66×6.66 mm vs 8.04×8.04 mm
42.14 mm²   61.41 mm²
Face-up size outline for 2.5ct Moissanite (8.04×8.04mm, radiant cut)
Face-up size outline for 2.5ct Cubic Zirconia (6.66×6.66mm, radiant cut)
2.5ct Cubic Zirconia Radiant (6.66×6.66mm)
2.5ct Moissanite Radiant (8.04×8.04mm)
Difference: 46% (19.27 mm²)
2.5ct Moissanite (Radiant, 8.04×8.04mm) has approx. 46% more face-up area than 2.5ct Cubic Zirconia (Radiant, 6.66×6.66mm).


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