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8.5ct Diamond (Round, 13.27×13.27mm, White) vs 8ct Diamond (Marquise, 20.78×10.39mm, White)


Quick summary: When looked from above (face-up position), 8ct Diamond (20.78×10.39mm, marquise cut) appears 11% larger than 8.5ct Diamond (13.27×13.27mm, round cut). See below how they compare side-by-side on a ring and finger.

8.5ct Diamond (round cut)
vs
 8ct Diamond (marquise cut)
white
 
white
13.27×13.27 mm 20.78×10.39 mm
actual size
Actual size of 8.5ct Diamond (round cut, 13.27×13.27mm, White color)   Actual size of 8ct Diamond (marquise cut, 20.78×10.39mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 8.5ct Diamond (round cut, 13.27×13.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 8ct Diamond (marquise cut, 20.78×10.39mm) 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
 79% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 8.5ct Diamond Round (13.27×13.27mm, White) and 8ct Diamond Marquise (20.78×10.39mm, 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

The face-up size depends on the shape of the gem, its weight and 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.


8.5 Ct Diamond (Round) 8 Ct Diamond (Marquise)
13.27×13.27 mm vs 20.78×10.39 mm
138.3 mm²   153.29 mm²
Face-up size outline for 8ct Diamond (20.78×10.39mm, marquise cut)
Face-up size outline for 8.5ct Diamond (13.27×13.27mm, round cut)
8.5ct Diamond Round (13.27×13.27mm)
8ct Diamond Marquise (20.78×10.39mm)
Difference: 11% (14.99 mm²)
8ct Diamond (Marquise, 20.78×10.39mm) has approx. 11% more face-up area than 8.5ct Diamond (Round, 13.27×13.27mm).


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