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20ct Diamond (Emerald, 18.13×13.43mm, White) vs 0.5ct Diamond (Marquise, 8.24×4.12mm, White)


Quick summary: When looked from above (face-up position), 20ct Diamond (18.13×13.43mm, emerald cut) appears 9.4 times larger than 0.5ct Diamond (8.24×4.12mm, marquise cut). See below how they compare side-by-side on a ring and finger.

20ct Diamond (emerald cut)
vs
 0.5ct Diamond (marquise cut)
white
 
white
18.13×13.43 mm 8.24×4.12 mm
actual size
Actual size of 20ct Diamond (emerald cut, 18.13×13.43mm, White color)   Actual size of 0.5ct Diamond (marquise cut, 8.24×4.12mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 20ct Diamond (emerald cut, 18.13×13.43mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.5ct Diamond (marquise cut, 8.24×4.12mm) 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
 80% vs 25%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 20ct Diamond Emerald (18.13×13.43mm, White) and 0.5ct Diamond Marquise (8.24×4.12mm, 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

The face-up size depends on the shape of the gem, its weight and 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.


20 Ct Diamond (Emerald) 0.5 Ct Diamond (Marquise)
18.13×13.43 mm vs 8.24×4.12 mm
226.44 mm²   24.1 mm²
Face-up size outline for 20ct Diamond (18.13×13.43mm, emerald cut)
Face-up size outline for 0.5ct Diamond (8.24×4.12mm, marquise cut)
20ct Diamond Emerald (18.13×13.43mm)
0.5ct Diamond Marquise (8.24×4.12mm)
Difference: 840% (202.34 mm²)
20ct Diamond (Emerald, 18.13×13.43mm) has approx. 840% more face-up area than 0.5ct Diamond (Marquise, 8.24×4.12mm). In other words, it's 9.4x larger.


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