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11ct Kyanite (Radiant, 12.6×12.6mm, Blue) vs 11ct Sapphire (Radiant, 12.25×12.25mm, Blue)


Quick summary: When looked from above (face-up position), 11ct Kyanite (12.6×12.6mm, radiant cut) appears 6% larger than 11ct Sapphire (12.25×12.25mm, radiant cut). See below how they compare side-by-side on a ring and finger.

11ct Kyanite (radiant cut)
vs
 11ct Sapphire (radiant cut)
blue
 
blue
12.6×12.6 mm 12.25×12.25 mm
actual size
Actual size of 11ct Kyanite (radiant cut, 12.6×12.6mm, Blue color)   Actual size of 11ct Sapphire (radiant cut, 12.25×12.25mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 11ct Kyanite (radiant cut, 12.6×12.6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 11ct Sapphire (radiant cut, 12.25×12.25mm) 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
 75% vs 73%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 11ct Kyanite Radiant (12.6×12.6mm, Blue) and 11ct Sapphire Radiant (12.25×12.25mm, 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, Sapphire will face-up smaller than Kyanite for a given carat weight, because it has higher specific gravity (4 vs. 3.68 - this means it's "heavier" compared to Kyanite 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.


11 Ct Kyanite (Radiant) 11 Ct Sapphire (Radiant)
12.6×12.6 mm vs 12.25×12.25 mm
150.82 mm²   142.56 mm²
Face-up size outline for 11ct Kyanite (12.6×12.6mm, radiant cut)
Face-up size outline for 11ct Sapphire (12.25×12.25mm, radiant cut)
11ct Kyanite Radiant (12.6×12.6mm)
11ct Sapphire Radiant (12.25×12.25mm)
Difference: 6% (8.26 mm²)
11ct Kyanite (Radiant, 12.6×12.6mm) has approx. 6% more face-up area than 11ct Sapphire (Radiant, 12.25×12.25mm).


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