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5ct Emerald (Cushion, 10.9×10.9mm, Dark Green) vs 3ct Diamond (Oval, 11.7×7.8mm, White)


Quick summary: When looked from above (face-up position), 5ct Emerald (10.9×10.9mm, cushion cut) appears 43% larger than 3ct Diamond (11.7×7.8mm, oval cut). See below how they compare side-by-side on a ring and finger.

5ct Emerald (cushion cut)
vs
 3ct Diamond (oval cut)
dark green
 
white
10.9×10.9 mm 11.7×7.8 mm
actual size
Actual size of 5ct Emerald (cushion cut, 10.9×10.9mm, Dark Green 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
Dark Green 5ct Emerald (cushion cut, 10.9×10.9mm) 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
 65% vs 47%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Emerald Cushion (10.9×10.9mm, Dark Green) 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

All things being equal, Diamond will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.52 vs. 2.72 - this means it's "heavier" compared to Emerald of the same size). Face-up size also depends heavily on 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.


5 Ct Emerald (Cushion) 3 Ct Diamond (Oval)
10.9×10.9 mm vs 11.7×7.8 mm
106.93 mm²   74.83 mm²
Face-up size outline for 5ct Emerald (10.9×10.9mm, cushion cut)
Face-up size outline for 3ct Diamond (11.7×7.8mm, oval cut)
5ct Emerald Cushion (10.9×10.9mm)
3ct Diamond Oval (11.7×7.8mm)
Difference: 43% (32.1 mm²)
5ct Emerald (Cushion, 10.9×10.9mm) has approx. 43% more face-up area than 3ct Diamond (Oval, 11.7×7.8mm).


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