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0.3ct Emerald (Marquise, 7.54×3.77mm, Green) vs 2.5ct Diamond (Marquise, 14.1×7.05mm, White)


Quick summary: When looked from above (face-up position), 2.5ct Diamond (14.1×7.05mm, marquise cut) appears 3.5 times larger than 0.3ct Emerald (7.54×3.77mm, marquise cut). See below how they compare side-by-side on a ring and finger.

0.3ct Emerald (marquise cut)
vs
 2.5ct Diamond (marquise cut)
green
 
white
7.54×3.77 mm 14.1×7.05 mm
actual size
Actual size of 0.3ct Emerald (marquise cut, 7.54×3.77mm, Green color)   Actual size of 2.5ct Diamond (marquise cut, 14.1×7.05mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.3ct Emerald (marquise cut, 7.54×3.77mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2.5ct Diamond (marquise cut, 14.1×7.05mm) 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
 23% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.3ct Emerald Marquise (7.54×3.77mm, Green) and 2.5ct Diamond Marquise (14.1×7.05mm, 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.


0.3 Ct Emerald (Marquise) 2.5 Ct Diamond (Marquise)
7.54×3.77 mm vs 14.1×7.05 mm
20.18 mm²   70.58 mm²
Face-up size outline for 2.5ct Diamond (14.1×7.05mm, marquise cut)
Face-up size outline for 0.3ct Emerald (7.54×3.77mm, marquise cut)
0.3ct Emerald Marquise (7.54×3.77mm)
2.5ct Diamond Marquise (14.1×7.05mm)
Difference: 250% (50.4 mm²)
2.5ct Diamond (Marquise, 14.1×7.05mm) has approx. 250% more face-up area than 0.3ct Emerald (Marquise, 7.54×3.77mm). In other words, it's 3.5x larger.


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