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15ct Diamond (Round, 16.03×16.03mm, White) vs 1ct Emerald (Emerald, 7.28×5.39mm, Green)


Quick summary: When looked from above (face-up position), 15ct Diamond (16.03×16.03mm, round cut) appears 5.5 times larger than 1ct Emerald (7.28×5.39mm, emerald cut). See below how they compare side-by-side on a ring and finger.

15ct Diamond (round cut)
vs
 1ct Emerald (emerald cut)
white
 
green
16.03×16.03 mm 7.28×5.39 mm
actual size
Actual size of 15ct Diamond (round cut, 16.03×16.03mm, White color)   Actual size of 1ct Emerald (emerald cut, 7.28×5.39mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 15ct Diamond (round cut, 16.03×16.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 1ct Emerald (emerald cut, 7.28×5.39mm) 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
 95% vs 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 15ct Diamond Round (16.03×16.03mm, White) and 1ct Emerald Emerald (7.28×5.39mm, 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.


15 Ct Diamond (Round) 1 Ct Emerald (Emerald)
16.03×16.03 mm vs 7.28×5.39 mm
201.82 mm²   36.49 mm²
Face-up size outline for 15ct Diamond (16.03×16.03mm, round cut)
Face-up size outline for 1ct Emerald (7.28×5.39mm, emerald cut)
15ct Diamond Round (16.03×16.03mm)
1ct Emerald Emerald (7.28×5.39mm)
Difference: 453% (165.33 mm²)
15ct Diamond (Round, 16.03×16.03mm) has approx. 453% more face-up area than 1ct Emerald (Emerald, 7.28×5.39mm). In other words, it's 5.53x larger.


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