×
carat vs. color  length*  width*
  ×

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

24ct Tanzanite (Cushion, 16.94×16.94mm, Blue) vs 24ct Aquamarine (Cushion, 18.16×18.16mm, Light Blue)


Quick summary: When looked from above (face-up position), 24ct Aquamarine (18.16×18.16mm, cushion cut) appears 15% larger than 24ct Tanzanite (16.94×16.94mm, cushion cut). See below how they compare side-by-side on a ring and finger.

24ct Tanzanite (cushion cut)
vs
 24ct Aquamarine (cushion cut)
blue
 
light blue
16.94×16.94 mm 18.16×18.16 mm
actual size
Actual size of 24ct Tanzanite (cushion cut, 16.94×16.94mm, Blue color)   Actual size of 24ct Aquamarine (cushion cut, 18.16×18.16mm, 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 24ct Tanzanite (cushion cut, 16.94×16.94mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 24ct Aquamarine (cushion cut, 18.16×18.16mm) 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
 101% vs 108%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 24ct Tanzanite Cushion (16.94×16.94mm, Blue) and 24ct Aquamarine Cushion (18.16×18.16mm, 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.


24 Ct Tanzanite (Cushion) 24 Ct Aquamarine (Cushion)
16.94×16.94 mm vs 18.16×18.16 mm
258.27 mm²   296.81 mm²
Face-up size outline for 24ct Aquamarine (18.16×18.16mm, cushion cut)
Face-up size outline for 24ct Tanzanite (16.94×16.94mm, cushion cut)
24ct Tanzanite Cushion (16.94×16.94mm)
24ct Aquamarine Cushion (18.16×18.16mm)
Difference: 15% (38.54 mm²)
24ct Aquamarine (Cushion, 18.16×18.16mm) has approx. 15% more face-up area than 24ct Tanzanite (Cushion, 16.94×16.94mm).


Popular comparisons: