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13ct Aquamarine (Cushion, 14.8×14.8mm, Light Blue) vs 13ct Diamond (Cushion, 13.7×13.7mm, White)


Quick summary: When looked from above (face-up position), 13ct Aquamarine (14.8×14.8mm, cushion cut) appears 17% larger than 13ct Diamond (13.7×13.7mm, cushion cut). See below how they compare side-by-side on a ring and finger.

13ct Aquamarine (cushion cut)
vs
 13ct Diamond (cushion cut)
light blue
 
white
14.8×14.8 mm 13.7×13.7 mm
actual size
Actual size of 13ct Aquamarine (cushion cut, 14.8×14.8mm, Light Blue color)   Actual size of 13ct Diamond (cushion cut, 13.7×13.7mm, 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 13ct Aquamarine (cushion cut, 14.8×14.8mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 13ct Diamond (cushion cut, 13.7×13.7mm) 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
 88% vs 82%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 13ct Aquamarine Cushion (14.8×14.8mm, Light Blue) and 13ct Diamond Cushion (13.7×13.7mm, 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.


13 Ct Aquamarine (Cushion) 13 Ct Diamond (Cushion)
14.8×14.8 mm vs 13.7×13.7 mm
197.14 mm²   168.92 mm²
Face-up size outline for 13ct Aquamarine (14.8×14.8mm, cushion cut)
Face-up size outline for 13ct Diamond (13.7×13.7mm, cushion cut)
13ct Aquamarine Cushion (14.8×14.8mm)
13ct Diamond Cushion (13.7×13.7mm)
Difference: 17% (28.22 mm²)
13ct Aquamarine (Cushion, 14.8×14.8mm) has approx. 17% more face-up area than 13ct Diamond (Cushion, 13.7×13.7mm).


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