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4ct Diamond (Trillion, 12.28×12.28mm, White) vs 8ct Diamond (Oval, 16.23×10.82mm, White)


Quick summary: When looked from above (face-up position), 8ct Diamond (16.23×10.82mm, oval cut) appears 54% larger than 4ct Diamond (12.28×12.28mm, trillion cut). See below how they compare side-by-side on a ring and finger.

4ct Diamond (trillion cut)
vs
 8ct Diamond (oval cut)
white
 
white
12.28×12.28 mm 16.23×10.82 mm
actual size
Actual size of 4ct Diamond (trillion cut, 12.28×12.28mm, White color)   Actual size of 8ct Diamond (oval cut, 16.23×10.82mm, 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 (trillion cut, 12.28×12.28mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 8ct Diamond (oval cut, 16.23×10.82mm) 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
 73% vs 65%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Diamond Trillion (12.28×12.28mm, White) and 8ct Diamond Oval (16.23×10.82mm, 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 (Trillion) 8 Ct Diamond (Oval)
12.28×12.28 mm vs 16.23×10.82 mm
93.5 mm²   144 mm²
Face-up size outline for 8ct Diamond (16.23×10.82mm, oval cut)
Face-up size outline for 4ct Diamond (12.28×12.28mm, trillion cut)
4ct Diamond Trillion (12.28×12.28mm)
8ct Diamond Oval (16.23×10.82mm)
Difference: 54% (50.5 mm²)
8ct Diamond (Oval, 16.23×10.82mm) has approx. 54% more face-up area than 4ct Diamond (Trillion, 12.28×12.28mm).


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