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4ct Diamond (Radiant, 9.17×9.17mm, White) vs 3ct Diamond (Oval, 11.7×7.8mm, White)


Quick summary: When looked from above (face-up position), 4ct Diamond (9.17×9.17mm, radiant cut) appears 7% larger than 3ct Diamond (11.7×7.8mm, oval cut). See below how they compare side-by-side on a ring and finger.

4ct Diamond (radiant cut)
vs
 3ct Diamond (oval cut)
white
 
white
9.17×9.17 mm 11.7×7.8 mm
actual size
Actual size of 4ct Diamond (radiant cut, 9.17×9.17mm, White color)   Actual size of 3ct Diamond (oval cut, 11.7×7.8mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 4ct Diamond (radiant cut, 9.17×9.17mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 3ct Diamond (oval cut, 11.7×7.8mm) 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
 55% vs 47%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Diamond Radiant (9.17×9.17mm, White) and 3ct Diamond Oval (11.7×7.8mm, 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

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 (Radiant) 3 Ct Diamond (Oval)
9.17×9.17 mm vs 11.7×7.8 mm
79.88 mm²   74.83 mm²
Face-up size outline for 4ct Diamond (9.17×9.17mm, radiant cut)
Face-up size outline for 3ct Diamond (11.7×7.8mm, oval cut)
4ct Diamond Radiant (9.17×9.17mm)
3ct Diamond Oval (11.7×7.8mm)
Difference: 7% (5.05 mm²)
4ct Diamond (Radiant, 9.17×9.17mm) has approx. 7% more face-up area than 3ct Diamond (Oval, 11.7×7.8mm).


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