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0.2ct Aquamarine (Round, 3.99×3.99mm, Light Blue) vs 0.4ct Alexandrite (Marquise, 7.46×3.73mm, Violet)


Quick summary: When looked from above (face-up position), 0.4ct Alexandrite (7.46×3.73mm, marquise cut) appears 58% larger than 0.2ct Aquamarine (3.99×3.99mm, round cut). See below how they compare side-by-side on a ring and finger.

0.2ct Aquamarine (round cut)
vs
 0.4ct Alexandrite (marquise cut)
light blue
 
violet
3.99×3.99 mm 7.46×3.73 mm
actual size
Actual size of 0.2ct Aquamarine (round cut, 3.99×3.99mm, Light Blue color)   Actual size of 0.4ct Alexandrite (marquise cut, 7.46×3.73mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 0.2ct Aquamarine (round cut, 3.99×3.99mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 0.4ct Alexandrite (marquise cut, 7.46×3.73mm) 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
 24% vs 23%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.2ct Aquamarine Round (3.99×3.99mm, Light Blue) and 0.4ct Alexandrite Marquise (7.46×3.73mm, Violet) 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, Alexandrite will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.73 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.


0.2 Ct Aquamarine (Round) 0.4 Ct Alexandrite (Marquise)
3.99×3.99 mm vs 7.46×3.73 mm
12.5 mm²   19.76 mm²
Face-up size outline for 0.4ct Alexandrite (7.46×3.73mm, marquise cut)
Face-up size outline for 0.2ct Aquamarine (3.99×3.99mm, round cut)
0.2ct Aquamarine Round (3.99×3.99mm)
0.4ct Alexandrite Marquise (7.46×3.73mm)
Difference: 58% (7.26 mm²)
0.4ct Alexandrite (Marquise, 7.46×3.73mm) has approx. 58% more face-up area than 0.2ct Aquamarine (Round, 3.99×3.99mm).


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