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30ct Diamond (Round, 20.2×20.2mm, White) vs 15ct Diamond (Oval, 20.01×13.34mm, White)


Quick summary: When looked from above (face-up position), 30ct Diamond (20.2×20.2mm, round cut) appears 46% larger than 15ct Diamond (20.01×13.34mm, oval cut). See below how they compare side-by-side on a ring and finger.

30ct Diamond (round cut)
vs
 15ct Diamond (oval cut)
white
 
white
20.2×20.2 mm 20.01×13.34 mm
actual size
Actual size of 30ct Diamond (round cut, 20.2×20.2mm, White color)   Actual size of 15ct Diamond (oval cut, 20.01×13.34mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 30ct Diamond (round cut, 20.2×20.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 15ct Diamond (oval cut, 20.01×13.34mm) 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
 120% vs 79%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 30ct Diamond Round (20.2×20.2mm, White) and 15ct Diamond Oval (20.01×13.34mm, 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.


30 Ct Diamond (Round) 15 Ct Diamond (Oval)
20.2×20.2 mm vs 20.01×13.34 mm
320.47 mm²   218.89 mm²
Face-up size outline for 30ct Diamond (20.2×20.2mm, round cut)
Face-up size outline for 15ct Diamond (20.01×13.34mm, oval cut)
30ct Diamond Round (20.2×20.2mm)
15ct Diamond Oval (20.01×13.34mm)
Difference: 46% (101.58 mm²)
30ct Diamond (Round, 20.2×20.2mm) has approx. 46% more face-up area than 15ct Diamond (Oval, 20.01×13.34mm).


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