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7.5ct Tanzanite (Oval, 15.92×10.61mm, Blue) vs 7.5ct Kyanite (Oval, 15.44×10.29mm, Blue)


Quick summary: When looked from above (face-up position), 7.5ct Tanzanite (15.92×10.61mm, oval cut) appears 6% larger than 7.5ct Kyanite (15.44×10.29mm, oval cut). See below how they compare side-by-side on a ring and finger.

7.5ct Tanzanite (oval cut)
vs
 7.5ct Kyanite (oval cut)
blue
 
blue
15.92×10.61 mm 15.44×10.29 mm
actual size
Actual size of 7.5ct Tanzanite (oval cut, 15.92×10.61mm, Blue color)   Actual size of 7.5ct Kyanite (oval cut, 15.44×10.29mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 7.5ct Tanzanite (oval cut, 15.92×10.61mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7.5ct Kyanite (oval cut, 15.44×10.29mm) 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 61%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7.5ct Tanzanite Oval (15.92×10.61mm, Blue) and 7.5ct Kyanite Oval (15.44×10.29mm, 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.


7.5 Ct Tanzanite (Oval) 7.5 Ct Kyanite (Oval)
15.92×10.61 mm vs 15.44×10.29 mm
138.51 mm²   130.28 mm²
Face-up size outline for 7.5ct Tanzanite (15.92×10.61mm, oval cut)
Face-up size outline for 7.5ct Kyanite (15.44×10.29mm, oval cut)
7.5ct Tanzanite Oval (15.92×10.61mm)
7.5ct Kyanite Oval (15.44×10.29mm)
Difference: 6% (8.23 mm²)
7.5ct Tanzanite (Oval, 15.92×10.61mm) has approx. 6% more face-up area than 7.5ct Kyanite (Oval, 15.44×10.29mm).


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