×
carat vs. color  length*  width*
  ×

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

13ct Tanzanite (Marquise, 24.26×12.13mm, Blue) vs 13ct Aquamarine (Marquise, 26×13mm, Light Blue)


Quick summary: When looked from above (face-up position), 13ct Aquamarine (26×13mm, marquise cut) appears 15% larger than 13ct Tanzanite (24.26×12.13mm, marquise cut). See below how they compare side-by-side on a ring and finger.

13ct Tanzanite (marquise cut)
vs
 13ct Aquamarine (marquise cut)
blue
 
light blue
24.26×12.13 mm 26×13 mm
actual size
Actual size of 13ct Tanzanite (marquise cut, 24.26×12.13mm, Blue color)   Actual size of 13ct Aquamarine (marquise cut, 26×13mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 13ct Tanzanite (marquise cut, 24.26×12.13mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 13ct Aquamarine (marquise cut, 26×13mm) 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
 72% vs 77%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 13ct Tanzanite Marquise (24.26×12.13mm, Blue) and 13ct Aquamarine Marquise (26×13mm, Light Blue) 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, Tanzanite will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.35 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 Tanzanite (Marquise) 13 Ct Aquamarine (Marquise)
24.26×12.13 mm vs 26×13 mm
208.93 mm²   239.98 mm²
Face-up size outline for 13ct Aquamarine (26×13mm, marquise cut)
Face-up size outline for 13ct Tanzanite (24.26×12.13mm, marquise cut)
13ct Tanzanite Marquise (24.26×12.13mm)
13ct Aquamarine Marquise (26×13mm)
Difference: 15% (31.05 mm²)
13ct Aquamarine (Marquise, 26×13mm) has approx. 15% more face-up area than 13ct Tanzanite (Marquise, 24.26×12.13mm).


Popular comparisons: