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15ct Diamond (Marquise, 25.62×12.81mm, White) vs 8ct Diamond (Oval, 14.5×9.5mm, White)


Quick summary: When looked from above (face-up position), 15ct Diamond (25.62×12.81mm, marquise cut) appears 2.1 times larger than 8ct Diamond (14.5×9.5mm, oval cut). See below how they compare side-by-side on a ring and finger.

15ct Diamond (marquise cut)
vs
 8ct Diamond (oval cut)
white
 
white
25.62×12.81 mm 14.5×9.5 mm
actual size
Actual size of 15ct Diamond (marquise cut, 25.62×12.81mm, White color)   Actual size of 8ct Diamond (oval cut, 14.5×9.5mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 15ct Diamond (marquise cut, 25.62×12.81mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 8ct Diamond (oval cut, 14.5×9.5mm) 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 57%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 15ct Diamond Marquise (25.62×12.81mm, White) and 8ct Diamond Oval (14.5×9.5mm, 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.


15 Ct Diamond (Marquise) 8 Ct Diamond (Oval)
25.62×12.81 mm vs 14.5×9.5 mm
233.02 mm²   112.96 mm²
Face-up size outline for 15ct Diamond (25.62×12.81mm, marquise cut)
Face-up size outline for 8ct Diamond (14.5×9.5mm, oval cut)
15ct Diamond Marquise (25.62×12.81mm)
8ct Diamond Oval (14.5×9.5mm)
Difference: 106% (120.06 mm²)
15ct Diamond (Marquise, 25.62×12.81mm) has approx. 106% more face-up area than 8ct Diamond (Oval, 14.5×9.5mm). In other words, it's 2.06x larger.


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