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5.5ct Amethyst (Princess, 10.64×10.64mm, Violet) vs 5.5ct Tanzanite (Princess, 9.84×9.84mm, Blue)


Quick summary: When looked from above (face-up position), 5.5ct Amethyst (10.64×10.64mm, princess cut) appears 17% larger than 5.5ct Tanzanite (9.84×9.84mm, princess cut). See below how they compare side-by-side on a ring and finger.

5.5ct Amethyst (princess cut)
vs
5.5ct Tanzanite (princess cut)
violet
 
blue
10.64×10.64 mm 9.84×9.84 mm
actual size
Actual size of 5.5ct Amethyst (princess cut, 10.64×10.64mm, Violet color)   Actual size of 5.5ct Tanzanite (princess cut, 9.84×9.84mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 5.5ct Amethyst (princess cut, 10.64×10.64mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 5.5ct Tanzanite (princess cut, 9.84×9.84mm) 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
63% vs 59%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5.5ct Amethyst Princess (10.64×10.64mm, Violet) and 5.5ct Tanzanite Princess (9.84×9.84mm, 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 Amethyst for a given carat weight, because it has higher specific gravity (3.35 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.


5.5 Ct Amethyst (Princess) 5.5 Ct Tanzanite (Princess)
10.64×10.64 mm vs 9.84×9.84 mm
113.21 mm²   96.83 mm²
Face-up size outline for 5.5ct Amethyst (10.64×10.64mm, princess cut)
Face-up size outline for 5.5ct Tanzanite (9.84×9.84mm, princess cut)
5.5ct Amethyst Princess (10.64×10.64mm)
5.5ct Tanzanite Princess (9.84×9.84mm)
Difference: 17% (16.38 mm²)
5.5ct Amethyst (Princess, 10.64×10.64mm) has approx. 17% more face-up area than 5.5ct Tanzanite (Princess, 9.84×9.84mm).


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