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4.5ct Diamond (Trillion, 12.77×12.77mm, White) vs 4.5ct Cubic Zirconia (Trillion, 10.76×10.76mm, White)


Quick summary: When looked from above (face-up position), 4.5ct Diamond (12.77×12.77mm, trillion cut) appears 41% larger than 4.5ct Cubic Zirconia (10.76×10.76mm, trillion cut). See below how they compare side-by-side on a ring and finger.

4.5ct Diamond (trillion cut)
vs
 4.5ct Cubic Zirconia (trillion cut)
white
 
white
12.77×12.77 mm 10.76×10.76 mm
actual size
Actual size of 4.5ct Diamond (trillion cut, 12.77×12.77mm, White color)   Actual size of 4.5ct Cubic Zirconia (trillion cut, 10.76×10.76mm, 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 Diamond (trillion cut, 12.77×12.77mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 4.5ct Cubic Zirconia (trillion cut, 10.76×10.76mm) 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
 76% vs 64%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4.5ct Diamond Trillion (12.77×12.77mm, White) and 4.5ct Cubic Zirconia Trillion (10.76×10.76mm, 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.


4.5 Ct Diamond (Trillion) 4.5 Ct Cubic Zirconia (Trillion)
12.77×12.77 mm vs 10.76×10.76 mm
101.11 mm²   71.78 mm²
Face-up size outline for 4.5ct Diamond (12.77×12.77mm, trillion cut)
Face-up size outline for 4.5ct Cubic Zirconia (10.76×10.76mm, trillion cut)
4.5ct Diamond Trillion (12.77×12.77mm)
4.5ct Cubic Zirconia Trillion (10.76×10.76mm)
Difference: 41% (29.33 mm²)
4.5ct Diamond (Trillion, 12.77×12.77mm) has approx. 41% more face-up area than 4.5ct Cubic Zirconia (Trillion, 10.76×10.76mm).


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