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30ct Cubic Zirconia (Emerald, 17.69×13.1mm, White) vs 30ct Moissanite (Emerald, 21.33×15.8mm, White)


Quick summary: When looked from above (face-up position), 30ct Moissanite (21.33×15.8mm, emerald cut) appears 45% larger than 30ct Cubic Zirconia (17.69×13.1mm, emerald cut). See below how they compare side-by-side on a ring and finger.

30ct Cubic Zirconia (emerald cut)
vs
 30ct Moissanite (emerald cut)
white
 
white
17.69×13.1 mm 21.33×15.8 mm
actual size
Actual size of 30ct Cubic Zirconia (emerald cut, 17.69×13.1mm, White color)   Actual size of 30ct Moissanite (emerald cut, 21.33×15.8mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 30ct Cubic Zirconia (emerald cut, 17.69×13.1mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 30ct Moissanite (emerald cut, 21.33×15.8mm) 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
 78% vs 94%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 30ct Cubic Zirconia Emerald (17.69×13.1mm, White) and 30ct Moissanite Emerald (21.33×15.8mm, 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.


30 Ct Cubic Zirconia (Emerald) 30 Ct Moissanite (Emerald)
17.69×13.1 mm vs 21.33×15.8 mm
215.52 mm²   313.42 mm²
Face-up size outline for 30ct Moissanite (21.33×15.8mm, emerald cut)
Face-up size outline for 30ct Cubic Zirconia (17.69×13.1mm, emerald cut)
30ct Cubic Zirconia Emerald (17.69×13.1mm)
30ct Moissanite Emerald (21.33×15.8mm)
Difference: 45% (97.9 mm²)
30ct Moissanite (Emerald, 21.33×15.8mm) has approx. 45% more face-up area than 30ct Cubic Zirconia (Emerald, 17.69×13.1mm).


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