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1ct Kyanite (Oval, 7.77×5.18mm, Blue) vs 1ct Tanzanite (Oval, 7×5.38mm, Light Blue)


Quick summary: When looked from above (face-up position), 1ct Kyanite (7.77×5.18mm, oval cut) appears 7% larger than 1ct Tanzanite (7×5.38mm, oval cut). See below how they compare side-by-side on a ring and finger.

1ct Kyanite (oval cut)
vs
 1ct Tanzanite (oval cut)
blue
 
light blue
7.77×5.18 mm 7×5.38 mm
actual size
Actual size of 1ct Kyanite (oval cut, 7.77×5.18mm, Blue color)   Actual size of 1ct Tanzanite (oval cut, 7×5.38mm, 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 1ct Kyanite (oval cut, 7.77×5.18mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 1ct Tanzanite (oval cut, 7×5.38mm) 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
 31% vs 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Kyanite Oval (7.77×5.18mm, Blue) and 1ct Tanzanite Oval (7×5.38mm, 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, 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.


1 Ct Kyanite (Oval) 1 Ct Tanzanite (Oval)
7.77×5.18 mm vs 7×5.38 mm
33 mm²   30.88 mm²
Face-up size outline for 1ct Kyanite (7.77×5.18mm, oval cut)
Face-up size outline for 1ct Tanzanite (7×5.38mm, oval cut)
1ct Kyanite Oval (7.77×5.18mm)
1ct Tanzanite Oval (7×5.38mm)
Difference: 7% (2.12 mm²)
1ct Kyanite (Oval, 7.77×5.18mm) has approx. 7% more face-up area than 1ct Tanzanite (Oval, 7×5.38mm).


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