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3ct Diamond (Round, 9.37×9.37mm, Black) vs 7ct Emerald (Emerald, 13.92×10.31mm, Green)


Quick summary: When looked from above (face-up position), 7ct Emerald (13.92×10.31mm, emerald cut) appears 94% larger than 3ct Colored Diamond (9.37×9.37mm, round cut). See below how they compare side-by-side on a ring and finger.

3ct Diamond (round cut)
vs
 7ct Emerald (emerald cut)
black
 
green
9.37×9.37 mm 13.92×10.31 mm
actual size
Actual size of 3ct Diamond (round cut, 9.37×9.37mm, Black color)   Actual size of 7ct Emerald (emerald cut, 13.92×10.31mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Black 3ct Diamond (round cut, 9.37×9.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 7ct Emerald (emerald cut, 13.92×10.31mm) 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
 56% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Diamond Round (9.37×9.37mm, Black) and 7ct Emerald Emerald (13.92×10.31mm, Green) 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.


3 Ct Colored Diamond (Round) 7 Ct Emerald (Emerald)
9.37×9.37 mm vs 13.92×10.31 mm
68.96 mm²   133.47 mm²
Face-up size outline for 7ct Emerald (13.92×10.31mm, emerald cut)
Face-up size outline for 3ct Diamond (9.37×9.37mm, round cut)
3ct Colored Diamond Round (9.37×9.37mm)
7ct Emerald Emerald (13.92×10.31mm)
Difference: 94% (64.51 mm²)
7ct Emerald (Emerald, 13.92×10.31mm) has approx. 94% more face-up area than 3ct Colored Diamond (Round, 9.37×9.37mm).


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