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18ct Aquamarine (Pear, 25.35×15.27mm, Light Blue) vs 18ct Diamond (Pear, 23.7×14.28mm, White)


Quick summary: When looked from above (face-up position), 18ct Aquamarine (25.35×15.27mm, pear cut) appears 14% larger than 18ct Diamond (23.7×14.28mm, pear cut). See below how they compare side-by-side on a ring and finger.

18ct Aquamarine (pear cut)
vs
 18ct Diamond (pear cut)
light blue
 
white
25.35×15.27 mm 23.7×14.28 mm
actual size
Actual size of 18ct Aquamarine (pear cut, 25.35×15.27mm, Light Blue color)   Actual size of 18ct Diamond (pear cut, 23.7×14.28mm, 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 18ct Aquamarine (pear cut, 25.35×15.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 18ct Diamond (pear cut, 23.7×14.28mm) 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 85%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Aquamarine Pear (25.35×15.27mm, Light Blue) and 18ct Diamond Pear (23.7×14.28mm, 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.


18 Ct Aquamarine (Pear) 18 Ct Diamond (Pear)
25.35×15.27 mm vs 23.7×14.28 mm
282.58 mm²   247.06 mm²
Face-up size outline for 18ct Aquamarine (25.35×15.27mm, pear cut)
Face-up size outline for 18ct Diamond (23.7×14.28mm, pear cut)
18ct Aquamarine Pear (25.35×15.27mm)
18ct Diamond Pear (23.7×14.28mm)
Difference: 14% (35.52 mm²)
18ct Aquamarine (Pear, 25.35×15.27mm) has approx. 14% more face-up area than 18ct Diamond (Pear, 23.7×14.28mm).


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