×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

19ct Aquamarine (Marquise, 29.5×14.75mm, Light Blue) vs 19ct Diamond (Marquise, 27.72×13.86mm, White)


Quick summary: When looked from above (face-up position), 19ct Aquamarine (29.5×14.75mm, marquise cut) appears 13% larger than 19ct Diamond (27.72×13.86mm, marquise cut). See below how they compare side-by-side on a ring and finger.

19ct Aquamarine (marquise cut)
vs
 19ct Diamond (marquise cut)
light blue
 
white
29.5×14.75 mm 27.72×13.86 mm
actual size
Actual size of 19ct Aquamarine (marquise cut, 29.5×14.75mm, Light Blue color)   Actual size of 19ct Diamond (marquise cut, 27.72×13.86mm, 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 19ct Aquamarine (marquise cut, 29.5×14.75mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 19ct Diamond (marquise cut, 27.72×13.86mm) 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 83%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 19ct Aquamarine Marquise (29.5×14.75mm, Light Blue) and 19ct Diamond Marquise (27.72×13.86mm, 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.


19 Ct Aquamarine (Marquise) 19 Ct Diamond (Marquise)
29.5×14.75 mm vs 27.72×13.86 mm
308.94 mm²   272.78 mm²
Face-up size outline for 19ct Aquamarine (29.5×14.75mm, marquise cut)
Face-up size outline for 19ct Diamond (27.72×13.86mm, marquise cut)
19ct Aquamarine Marquise (29.5×14.75mm)
19ct Diamond Marquise (27.72×13.86mm)
Difference: 13% (36.16 mm²)
19ct Aquamarine (Marquise, 29.5×14.75mm) has approx. 13% more face-up area than 19ct Diamond (Marquise, 27.72×13.86mm).


Popular comparisons: