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28ct Tanzanite (Princess, 16.92×16.92mm, Blue) vs 28ct Aquamarine (Princess, 18.14×18.14mm, Light Blue)


Quick summary: When looked from above (face-up position), 28ct Aquamarine (18.14×18.14mm, princess cut) appears 15% larger than 28ct Tanzanite (16.92×16.92mm, princess cut). See below how they compare side-by-side on a ring and finger.

28ct Tanzanite (princess cut)
vs
 28ct Aquamarine (princess cut)
blue
 
light blue
16.92×16.92 mm 18.14×18.14 mm
actual size
Actual size of 28ct Tanzanite (princess cut, 16.92×16.92mm, Blue color)   Actual size of 28ct Aquamarine (princess cut, 18.14×18.14mm, 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 28ct Tanzanite (princess cut, 16.92×16.92mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 28ct Aquamarine (princess cut, 18.14×18.14mm) 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
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Actual sizes of 28ct Tanzanite Princess (16.92×16.92mm, Blue) and 28ct Aquamarine Princess (18.14×18.14mm, 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.


28 Ct Tanzanite (Princess) 28 Ct Aquamarine (Princess)
16.92×16.92 mm vs 18.14×18.14 mm
286.29 mm²   329.06 mm²
Face-up size outline for 28ct Aquamarine (18.14×18.14mm, princess cut)
Face-up size outline for 28ct Tanzanite (16.92×16.92mm, princess cut)
28ct Tanzanite Princess (16.92×16.92mm)
28ct Aquamarine Princess (18.14×18.14mm)
Difference: 15% (42.77 mm²)
28ct Aquamarine (Princess, 18.14×18.14mm) has approx. 15% more face-up area than 28ct Tanzanite (Princess, 16.92×16.92mm).


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