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40ct Amethyst (Baguette, 27.2×18.13mm, Violet) vs 40ct Aquamarine (Cushion, 21.8×21.8mm, Light Blue)


Quick summary: When looked from above (face-up position), 40ct Amethyst (27.2×18.13mm, baguette cut) appears 15% larger than 40ct Aquamarine (21.8×21.8mm, cushion cut). See below how they compare side-by-side on a ring and finger.

40ct Amethyst (baguette cut)
vs
 40ct Aquamarine (cushion cut)
violet
 
light blue
27.2×18.13 mm 21.8×21.8 mm
actual size
Actual size of 40ct Amethyst (baguette cut, 27.2×18.13mm, Violet color)   Actual size of 40ct Aquamarine (cushion cut, 21.8×21.8mm, Light Blue 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 (baguette cut, 27.2×18.13mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 40ct Aquamarine (cushion cut, 21.8×21.8mm) 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
 108% vs 129%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 40ct Amethyst Baguette (27.2×18.13mm, Violet) and 40ct Aquamarine Cushion (21.8×21.8mm, Light 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, Aquamarine 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 (Baguette) 40 Ct Aquamarine (Cushion)
27.2×18.13 mm vs 21.8×21.8 mm
493.14 mm²   427.72 mm²
Face-up size outline for 40ct Amethyst (27.2×18.13mm, baguette cut)
Face-up size outline for 40ct Aquamarine (21.8×21.8mm, cushion cut)
40ct Amethyst Baguette (27.2×18.13mm)
40ct Aquamarine Cushion (21.8×21.8mm)
Difference: 15% (65.42 mm²)
40ct Amethyst (Baguette, 27.2×18.13mm) has approx. 15% more face-up area than 40ct Aquamarine (Cushion, 21.8×21.8mm).


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