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40ct Diamond (Trillion, 26.46×26.46mm, White) vs 40ct Emerald (Trillion, 28.43×28.43mm, Green)


Quick summary: When looked from above (face-up position), 40ct Emerald (28.43×28.43mm, trillion cut) appears 15% larger than 40ct Diamond (26.46×26.46mm, trillion cut). See below how they compare side-by-side on a ring and finger.

40ct Diamond (trillion cut)
vs
 40ct Emerald (trillion cut)
white
 
green
26.46×26.46 mm 28.43×28.43 mm
actual size
Actual size of 40ct Diamond (trillion cut, 26.46×26.46mm, White color)   Actual size of 40ct Emerald (trillion cut, 28.43×28.43mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 40ct Diamond (trillion cut, 26.46×26.46mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 40ct Emerald (trillion cut, 28.43×28.43mm) 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
 157% vs 169%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 40ct Diamond Trillion (26.46×26.46mm, White) and 40ct Emerald Trillion (28.43×28.43mm, 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.


40 Ct Diamond (Trillion) 40 Ct Emerald (Trillion)
26.46×26.46 mm vs 28.43×28.43 mm
434.08 mm²   501.12 mm²
Face-up size outline for 40ct Emerald (28.43×28.43mm, trillion cut)
Face-up size outline for 40ct Diamond (26.46×26.46mm, trillion cut)
40ct Diamond Trillion (26.46×26.46mm)
40ct Emerald Trillion (28.43×28.43mm)
Difference: 15% (67.04 mm²)
40ct Emerald (Trillion, 28.43×28.43mm) has approx. 15% more face-up area than 40ct Diamond (Trillion, 26.46×26.46mm).


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