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1.8ct Emerald (Emerald, 8.86×6.56mm, Green) vs 3ct Sapphire (Emerald, 9.21×6.82mm, Blue)


Quick summary: When looked from above (face-up position), 3ct Sapphire (9.21×6.82mm, emerald cut) appears 8% larger than 1.8ct Emerald (8.86×6.56mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.8ct Emerald (emerald cut)
vs
3ct Sapphire (emerald cut)
green
 
blue
8.86×6.56 mm 9.21×6.82 mm
actual size
Actual size of 1.8ct Emerald (emerald cut, 8.86×6.56mm, Green color)   Actual size of 3ct Sapphire (emerald cut, 9.21×6.82mm, Blue color)
 
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Ring: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on left finger
Green 1.8ct Emerald (emerald cut, 8.86×6.56mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3ct Sapphire (emerald cut, 9.21×6.82mm) 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
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Ring diameter: 16.9 mm
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Actual sizes of 1.8ct Emerald Emerald (8.86×6.56mm, Green) and 3ct Sapphire Emerald (9.21×6.82mm, Blue) 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, Sapphire will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (4 vs. 2.7 - 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 Emerald (Emerald) 3 Ct Sapphire (Emerald)
8.86×6.56 mm vs 9.21×6.82 mm
54.05 mm²   58.42 mm²
Face-up size outline for 3ct Sapphire (9.21×6.82mm, emerald cut)
Face-up size outline for 1.8ct Emerald (8.86×6.56mm, emerald cut)
1.8ct Emerald Emerald (8.86×6.56mm)
3ct Sapphire Emerald (9.21×6.82mm)
Difference: 8% (4.37 mm²)
3ct Sapphire Emerald (9.21×6.82mm) has approx. 8% more face-up area than 1.8ct Emerald Emerald (8.86×6.56mm).


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