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40ct Kyanite (Cushion, 19.46×19.46mm, Blue) vs 40ct Sapphire (Cushion, 18.93×18.93mm, Blue)


Quick summary: When looked from above (face-up position), 40ct Kyanite (19.46×19.46mm, cushion cut) appears 6% larger than 40ct Sapphire (18.93×18.93mm, cushion cut). See below how they compare side-by-side on a ring and finger.

40ct Kyanite (cushion cut)
vs
 40ct Sapphire (cushion cut)
blue
 
blue
19.46×19.46 mm 18.93×18.93 mm
actual size
Actual size of 40ct Kyanite (cushion cut, 19.46×19.46mm, Blue color)   Actual size of 40ct Sapphire (cushion cut, 18.93×18.93mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 40ct Kyanite (cushion cut, 19.46×19.46mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 40ct Sapphire (cushion cut, 18.93×18.93mm) 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
 116% vs 113%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 40ct Kyanite Cushion (19.46×19.46mm, Blue) and 40ct Sapphire Cushion (18.93×18.93mm, 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.


40 Ct Kyanite (Cushion) 40 Ct Sapphire (Cushion)
19.46×19.46 mm vs 18.93×18.93 mm
340.82 mm²   322.51 mm²
Face-up size outline for 40ct Kyanite (19.46×19.46mm, cushion cut)
Face-up size outline for 40ct Sapphire (18.93×18.93mm, cushion cut)
40ct Kyanite Cushion (19.46×19.46mm)
40ct Sapphire Cushion (18.93×18.93mm)
Difference: 6% (18.31 mm²)
40ct Kyanite (Cushion, 19.46×19.46mm) has approx. 6% more face-up area than 40ct Sapphire (Cushion, 18.93×18.93mm).


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