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6ct Diamond (Round, 11.81×11.81mm, White) vs 6ct Cubic Zirconia (Round, 9.8×9.8mm, White)


Quick summary: When looked from above (face-up position), 6ct Diamond (11.81×11.81mm, round cut) appears 45% larger than 6ct Cubic Zirconia (9.8×9.8mm, round cut). See below how they compare side-by-side on a ring and finger.

6ct Diamond (round cut)
vs
 6ct Cubic Zirconia (round cut)
white
 
white
11.81×11.81 mm 9.8×9.8 mm
actual size
Actual size of 6ct Diamond (round cut, 11.81×11.81mm, White color)   Actual size of 6ct Cubic Zirconia (round cut, 9.8×9.8mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 6ct Diamond (round cut, 11.81×11.81mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 6ct Cubic Zirconia (round cut, 9.8×9.8mm) 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
 70% vs 58%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 6ct Diamond Round (11.81×11.81mm, White) and 6ct Cubic Zirconia Round (9.8×9.8mm, 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 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.


6 Ct Diamond (Round) 6 Ct Cubic Zirconia (Round)
11.81×11.81 mm vs 9.8×9.8 mm
109.54 mm²   75.43 mm²
Face-up size outline for 6ct Diamond (11.81×11.81mm, round cut)
Face-up size outline for 6ct Cubic Zirconia (9.8×9.8mm, round cut)
6ct Diamond Round (11.81×11.81mm)
6ct Cubic Zirconia Round (9.8×9.8mm)
Difference: 45% (34.11 mm²)
6ct Diamond (Round, 11.81×11.81mm) has approx. 45% more face-up area than 6ct Cubic Zirconia (Round, 9.8×9.8mm).


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