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7ct Aquamarine (Trillion, 15.33×15.33mm, Light Blue) vs 7ct Diamond (Round, 12.43×12.43mm, White)


Quick summary: When looked from above (face-up position), 7ct Aquamarine (15.33×15.33mm, trillion cut) appears 20% larger than 7ct Diamond (12.43×12.43mm, round cut). See below how they compare side-by-side on a ring and finger.

7ct Aquamarine (trillion cut)
vs
 7ct Diamond (round cut)
light blue
 
white
15.33×15.33 mm 12.43×12.43 mm
actual size
Actual size of 7ct Aquamarine (trillion cut, 15.33×15.33mm, Light Blue color)   Actual size of 7ct Diamond (round cut, 12.43×12.43mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 7ct Aquamarine (trillion cut, 15.33×15.33mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 7ct Diamond (round cut, 12.43×12.43mm) 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
 91% vs 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Aquamarine Trillion (15.33×15.33mm, Light Blue) and 7ct Diamond Round (12.43×12.43mm, 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

All things being equal, Diamond will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.52 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.


7 Ct Aquamarine (Trillion) 7 Ct Diamond (Round)
15.33×15.33 mm vs 12.43×12.43 mm
145.71 mm²   121.35 mm²
Face-up size outline for 7ct Aquamarine (15.33×15.33mm, trillion cut)
Face-up size outline for 7ct Diamond (12.43×12.43mm, round cut)
7ct Aquamarine Trillion (15.33×15.33mm)
7ct Diamond Round (12.43×12.43mm)
Difference: 20% (24.36 mm²)
7ct Aquamarine (Trillion, 15.33×15.33mm) has approx. 20% more face-up area than 7ct Diamond (Round, 12.43×12.43mm).


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