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40ct Amethyst (Oval, 29.67×19.78mm, Violet) vs 40ct Emerald (Emerald, 24.89×18.44mm, Green)


Quick summary: When looked from above (face-up position), 40ct Amethyst (29.67×19.78mm, oval cut) appears 13% larger than 40ct Emerald (24.89×18.44mm, emerald cut). See below how they compare side-by-side on a ring and finger.

40ct Amethyst (oval cut)
vs
 40ct Emerald (emerald cut)
violet
 
green
29.67×19.78 mm 24.89×18.44 mm
actual size
Actual size of 40ct Amethyst (oval cut, 29.67×19.78mm, Violet color)   Actual size of 40ct Emerald (emerald cut, 24.89×18.44mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 40ct Amethyst (oval cut, 29.67×19.78mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 40ct Emerald (emerald cut, 24.89×18.44mm) 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
 118% vs 110%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 40ct Amethyst Oval (29.67×19.78mm, Violet) and 40ct Emerald Emerald (24.89×18.44mm, 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, Emerald will face-up slightly smaller than Amethyst for a given carat weight, because it has higher specific gravity (2.72 vs. 2.65 - this means it's "slightly heavier" compared to Amethyst 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 Amethyst (Oval) 40 Ct Emerald (Emerald)
29.67×19.78 mm vs 24.89×18.44 mm
481.24 mm²   426.84 mm²
Face-up size outline for 40ct Amethyst (29.67×19.78mm, oval cut)
Face-up size outline for 40ct Emerald (24.89×18.44mm, emerald cut)
40ct Amethyst Oval (29.67×19.78mm)
40ct Emerald Emerald (24.89×18.44mm)
Difference: 13% (54.4 mm²)
40ct Amethyst (Oval, 29.67×19.78mm) has approx. 13% more face-up area than 40ct Emerald (Emerald, 24.89×18.44mm).


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