×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

4.5ct Cubic Zirconia (Round, 8.91×8.91mm, White) vs 4.5ct Moissanite (Round, 11.07×11.07mm, White)


Quick summary: When looked from above (face-up position), 4.5ct Moissanite (11.07×11.07mm, round cut) appears 54% larger than 4.5ct Cubic Zirconia (8.91×8.91mm, round cut). See below how they compare side-by-side on a ring and finger.

4.5ct Cubic Zirconia (round cut)
vs
 4.5ct Moissanite (round cut)
white
 
white
8.91×8.91 mm 11.07×11.07 mm
actual size
Actual size of 4.5ct Cubic Zirconia (round cut, 8.91×8.91mm, White color)   Actual size of 4.5ct Moissanite (round cut, 11.07×11.07mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 4.5ct Cubic Zirconia (round cut, 8.91×8.91mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 4.5ct Moissanite (round cut, 11.07×11.07mm) 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
 53% vs 66%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 4.5ct Cubic Zirconia Round (8.91×8.91mm, White) and 4.5ct Moissanite Round (11.07×11.07mm, 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.


4.5 Ct Cubic Zirconia (Round) 4.5 Ct Moissanite (Round)
8.91×8.91 mm vs 11.07×11.07 mm
62.35 mm²   96.25 mm²
Face-up size outline for 4.5ct Moissanite (11.07×11.07mm, round cut)
Face-up size outline for 4.5ct Cubic Zirconia (8.91×8.91mm, round cut)
4.5ct Cubic Zirconia Round (8.91×8.91mm)
4.5ct Moissanite Round (11.07×11.07mm)
Difference: 54% (33.9 mm²)
4.5ct Moissanite (Round, 11.07×11.07mm) has approx. 54% more face-up area than 4.5ct Cubic Zirconia (Round, 8.91×8.91mm).


Popular comparisons: