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0.4ct Emerald (Emerald, 5.36×3.97mm, Green) vs 0.5ct Diamond (Round, 5.16×5.16mm, White)


Quick summary: When looked from above (face-up position), 0.5ct Diamond (5.16×5.16mm, round cut) appears 6% larger than 0.4ct Emerald (5.36×3.97mm, emerald cut). See below how they compare side-by-side on a ring and finger.

0.4ct Emerald (emerald cut)
vs
 0.5ct Diamond (round cut)
green
 
white
5.36×3.97 mm 5.16×5.16 mm
actual size
Actual size of 0.4ct Emerald (emerald cut, 5.36×3.97mm, Green color)   Actual size of 0.5ct Diamond (round cut, 5.16×5.16mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.4ct Emerald (emerald cut, 5.36×3.97mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.5ct Diamond (round cut, 5.16×5.16mm) 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
 24% vs 31%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.4ct Emerald Emerald (5.36×3.97mm, Green) and 0.5ct Diamond Round (5.16×5.16mm, 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.


0.4 Ct Emerald (Emerald) 0.5 Ct Diamond (Round)
5.36×3.97 mm vs 5.16×5.16 mm
19.79 mm²   20.91 mm²
Face-up size outline for 0.5ct Diamond (5.16×5.16mm, round cut)
Face-up size outline for 0.4ct Emerald (5.36×3.97mm, emerald cut)
0.4ct Emerald Emerald (5.36×3.97mm)
0.5ct Diamond Round (5.16×5.16mm)
Difference: 6% (1.12 mm²)
0.5ct Diamond (Round, 5.16×5.16mm) has approx. 6% more face-up area than 0.4ct Emerald (Emerald, 5.36×3.97mm).


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