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1ct Emerald (Marquise, 11.26×5.63mm, Green) vs 2ct Diamond (Round, 8.19×8.19mm, White)


Quick summary: When looked from above (face-up position), 2ct Diamond (8.19×8.19mm, round cut) appears 17% larger than 1ct Emerald (11.26×5.63mm, marquise cut). See below how they compare side-by-side on a ring and finger.

1ct Emerald (marquise cut)
vs
2ct Diamond (round cut)
green
 
white
11.26×5.63 mm 8.19×8.19 mm
actual size
Actual size of 1ct Emerald (marquise cut, 11.26×5.63mm, Green color)   Actual size of 2ct Diamond (round cut, 8.19×8.19mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 1ct Emerald (marquise cut, 11.26×5.63mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2ct Diamond (round cut, 8.19×8.19mm) 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
34% vs 49%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Emerald Marquise (11.26×5.63mm, Green) and 2ct Diamond Round (8.19×8.19mm, 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.


1 Ct Emerald (Marquise) 2 Ct Diamond (Round)
11.26×5.63 mm vs 8.19×8.19 mm
45.01 mm²   52.68 mm²
Face-up size outline for 2ct Diamond (8.19×8.19mm, round cut)
Face-up size outline for 1ct Emerald (11.26×5.63mm, marquise cut)
1ct Emerald Marquise (11.26×5.63mm)
2ct Diamond Round (8.19×8.19mm)
Difference: 17% (7.67 mm²)
2ct Diamond (Round, 8.19×8.19mm) has approx. 17% more face-up area than 1ct Emerald (Marquise, 11.26×5.63mm).


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