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1.8ct Diamond (Round, 7.75×7.78mm, White) vs 1.6ct Emerald (Emerald, 7.45×7.48mm, Green)


Quick summary: When looked from above (face-up position), 1.6ct Emerald (7.45×7.48mm, emerald cut) appears 9% larger than 1.8ct Diamond (7.75×7.78mm, round cut). See below how they compare side-by-side on a ring and finger.

1.8ct Diamond (round cut)
vs
 1.6ct Emerald (emerald cut)
white
 
green
7.75×7.78 mm 7.45×7.48 mm
actual size
Actual size of 1.8ct Diamond (round cut, 7.75×7.78mm, White color)   Actual size of 1.6ct Emerald (emerald cut, 7.45×7.48mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.8ct Diamond (round cut, 7.75×7.78mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 1.6ct Emerald (emerald cut, 7.45×7.48mm) 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
 47% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.8ct Diamond Round (7.75×7.78mm, White) and 1.6ct Emerald Emerald (7.45×7.48mm, 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.


1.8 Ct Diamond (Round) 1.6 Ct Emerald (Emerald)
7.75×7.78 mm vs 7.45×7.48 mm
47.36 mm²   51.83 mm²
Face-up size outline for 1.6ct Emerald (7.45×7.48mm, emerald cut)
Face-up size outline for 1.8ct Diamond (7.75×7.78mm, round cut)
1.8ct Diamond Round (7.75×7.78mm)
1.6ct Emerald Emerald (7.45×7.48mm)
Difference: 9% (4.47 mm²)
1.6ct Emerald (Emerald, 7.45×7.48mm) has approx. 9% more face-up area than 1.8ct Diamond (Round, 7.75×7.78mm).


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