×
carat vs. color  length*  width*
  ×

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

7.5ct Diamond (Round, 12.72×12.72mm, White) vs 7.5ct Cubic Zirconia (Round, 10.56×10.56mm, White)


Quick summary: When looked from above (face-up position), 7.5ct Diamond (12.72×12.72mm, round cut) appears 45% larger than 7.5ct Cubic Zirconia (10.56×10.56mm, round cut). See below how they compare side-by-side on a ring and finger.

7.5ct Diamond (round cut)
vs
 7.5ct Cubic Zirconia (round cut)
white
 
white
12.72×12.72 mm 10.56×10.56 mm
actual size
Actual size of 7.5ct Diamond (round cut, 12.72×12.72mm, White color)   Actual size of 7.5ct Cubic Zirconia (round cut, 10.56×10.56mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 7.5ct Diamond (round cut, 12.72×12.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 7.5ct Cubic Zirconia (round cut, 10.56×10.56mm) 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 63%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 7.5ct Diamond Round (12.72×12.72mm, White) and 7.5ct Cubic Zirconia Round (10.56×10.56mm, 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.


7.5 Ct Diamond (Round) 7.5 Ct Cubic Zirconia (Round)
12.72×12.72 mm vs 10.56×10.56 mm
127.08 mm²   87.58 mm²
Face-up size outline for 7.5ct Diamond (12.72×12.72mm, round cut)
Face-up size outline for 7.5ct Cubic Zirconia (10.56×10.56mm, round cut)
7.5ct Diamond Round (12.72×12.72mm)
7.5ct Cubic Zirconia Round (10.56×10.56mm)
Difference: 45% (39.5 mm²)
7.5ct Diamond (Round, 12.72×12.72mm) has approx. 45% more face-up area than 7.5ct Cubic Zirconia (Round, 10.56×10.56mm).


Popular comparisons: