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5ct Kyanite (Oval, 13.31×8.87mm, Blue) vs 5ct Tanzanite (Marquise, 18×9mm, Blue)


Quick summary: When looked from above (face-up position), 5ct Tanzanite (18×9mm, marquise cut) appears 19% larger than 5ct Kyanite (13.31×8.87mm, oval cut). See below how they compare side-by-side on a ring and finger.

5ct Kyanite (oval cut)
vs
 5ct Tanzanite (marquise cut)
blue
 
blue
13.31×8.87 mm 18×9 mm
actual size
Actual size of 5ct Kyanite (oval cut, 13.31×8.87mm, Blue color)   Actual size of 5ct Tanzanite (marquise cut, 18×9mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 5ct Kyanite (oval cut, 13.31×8.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 5ct Tanzanite (marquise cut, 18×9mm) 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
 53% vs 54%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Kyanite Oval (13.31×8.87mm, Blue) and 5ct Tanzanite Marquise (18×9mm, 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, Kyanite will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.68 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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 Ct Kyanite (Oval) 5 Ct Tanzanite (Marquise)
13.31×8.87 mm vs 18×9 mm
96.81 mm²   115.02 mm²
Face-up size outline for 5ct Tanzanite (18×9mm, marquise cut)
Face-up size outline for 5ct Kyanite (13.31×8.87mm, oval cut)
5ct Kyanite Oval (13.31×8.87mm)
5ct Tanzanite Marquise (18×9mm)
Difference: 19% (18.21 mm²)
5ct Tanzanite (Marquise, 18×9mm) has approx. 19% more face-up area than 5ct Kyanite (Oval, 13.31×8.87mm).


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