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5.5ct Diamond (Emerald, 11.8×8.74mm, White) vs 5.5ct Cubic Zirconia (Emerald, 10.04×7.44mm, White)


Quick summary: When looked from above (face-up position), 5.5ct Diamond (11.8×8.74mm, emerald cut) appears 38% larger than 5.5ct Cubic Zirconia (10.04×7.44mm, emerald cut). See below how they compare side-by-side on a ring and finger.

5.5ct Diamond (emerald cut)
vs
 5.5ct Cubic Zirconia (emerald cut)
white
 
white
11.8×8.74 mm 10.04×7.44 mm
actual size
Actual size of 5.5ct Diamond (emerald cut, 11.8×8.74mm, White color)   Actual size of 5.5ct Cubic Zirconia (emerald cut, 10.04×7.44mm, 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 Diamond (emerald cut, 11.8×8.74mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 5.5ct Cubic Zirconia (emerald cut, 10.04×7.44mm) 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 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5.5ct Diamond Emerald (11.8×8.74mm, White) and 5.5ct Cubic Zirconia Emerald (10.04×7.44mm, 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 Diamond for a given carat weight, because it has higher specific gravity (5.65 vs. 3.52 - this means it's "heavier" compared to Diamond 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 Diamond (Emerald) 5.5 Ct Cubic Zirconia (Emerald)
11.8×8.74 mm vs 10.04×7.44 mm
95.91 mm²   69.47 mm²
Face-up size outline for 5.5ct Diamond (11.8×8.74mm, emerald cut)
Face-up size outline for 5.5ct Cubic Zirconia (10.04×7.44mm, emerald cut)
5.5ct Diamond Emerald (11.8×8.74mm)
5.5ct Cubic Zirconia Emerald (10.04×7.44mm)
Difference: 38% (26.44 mm²)
5.5ct Diamond (Emerald, 11.8×8.74mm) has approx. 38% more face-up area than 5.5ct Cubic Zirconia (Emerald, 10.04×7.44mm).


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