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4ct Diamond (Marquise, 16×8mm, White) vs 5ct Diamond (Marquise, 18×9mm, White)


Quick summary: When looked from above (face-up position), 5ct Diamond (18×9mm, marquise cut) appears 27% larger than 4ct Diamond (16×8mm, marquise cut). See below how they compare side-by-side on a ring and finger.

4ct Diamond (marquise cut)
vs
 5ct Diamond (marquise cut)
white
 
white
16×8 mm 18×9 mm
actual size
Actual size of 4ct Diamond (marquise cut, 16×8mm, White color)   Actual size of 5ct Diamond (marquise cut, 18×9mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 4ct Diamond (marquise cut, 16×8mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 5ct Diamond (marquise cut, 18×9mm) 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
 48% vs 54%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Diamond Marquise (16×8mm, White) and 5ct Diamond Marquise (18×9mm, 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.


4 Ct Diamond (Marquise) 5 Ct Diamond (Marquise)
16×8 mm vs 18×9 mm
90.88 mm²   115.02 mm²
Face-up size outline for 5ct Diamond (18×9mm, marquise cut)
Face-up size outline for 4ct Diamond (16×8mm, marquise cut)
4ct Diamond Marquise (16×8mm)
5ct Diamond Marquise (18×9mm)
Difference: 27% (24.14 mm²)
5ct Diamond (Marquise, 18×9mm) has approx. 27% more face-up area than 4ct Diamond (Marquise, 16×8mm).


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