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1ct Moissanite (Round, 6.71×6.71mm, White) vs 1ct Cubic Zirconia (Round, 5.4×5.4mm, White)


Quick summary: When looked from above (face-up position), 1ct Moissanite (6.71×6.71mm, round cut) appears 54% larger than 1ct Cubic Zirconia (5.4×5.4mm, round cut). See below how they compare side-by-side on a ring and finger.

1ct Moissanite (round cut)
vs
1ct Cubic Zirconia (round cut)
white
 
white
6.71×6.71 mm 5.4×5.4 mm
actual size
Actual size of 1ct Moissanite (round cut, 6.71×6.71mm, White color)   Actual size of 1ct Cubic Zirconia (round cut, 5.4×5.4mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1ct Moissanite (round cut, 6.71×6.71mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Cubic Zirconia (round cut, 5.4×5.4mm) 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 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Moissanite Round (6.71×6.71mm, White) and 1ct Cubic Zirconia Round (5.4×5.4mm, 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.


1 Ct Moissanite (Round) 1 Ct Cubic Zirconia (Round)
6.71×6.71 mm vs 5.4×5.4 mm
35.36 mm²   22.9 mm²
Face-up size outline for 1ct Moissanite (6.71×6.71mm, round cut)
Face-up size outline for 1ct Cubic Zirconia (5.4×5.4mm, round cut)
1ct Moissanite Round (6.71×6.71mm)
1ct Cubic Zirconia Round (5.4×5.4mm)
Difference: 54% (12.46 mm²)
1ct Moissanite (Round, 6.71×6.71mm) has approx. 54% more face-up area than 1ct Cubic Zirconia (Round, 5.4×5.4mm).


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