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4ct Kyanite (Cushion, 9.03×9.03mm, Blue) vs 4ct Benitoite (Cushion, 9.06×9.06mm, Blue)


Quick summary: When looked from above (face-up position), 4ct Benitoite (9.06×9.06mm, cushion cut) appears 0.7% larger than 4ct Kyanite (9.03×9.03mm, cushion cut). See below how they compare side-by-side on a ring and finger.

4ct Kyanite (cushion cut)
vs
 4ct Benitoite (cushion cut)
blue
 
blue
9.03×9.03 mm 9.06×9.06 mm
actual size
Actual size of 4ct Kyanite (cushion cut, 9.03×9.03mm, Blue color)   Actual size of 4ct Benitoite (cushion cut, 9.06×9.06mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4ct Kyanite (cushion cut, 9.03×9.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 4ct Benitoite (cushion cut, 9.06×9.06mm) 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
 54% vs 54%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 4ct Kyanite Cushion (9.03×9.03mm, Blue) and 4ct Benitoite Cushion (9.06×9.06mm, 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 slightly smaller than Benitoite for a given carat weight, because it has higher specific gravity (3.68 vs. 3.65 - this means it's "slightly heavier" compared to Benitoite 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.


4 Ct Kyanite (Cushion) 4 Ct Benitoite (Cushion)
9.03×9.03 mm vs 9.06×9.06 mm
73.39 mm²   73.88 mm²
Face-up size outline for 4ct Benitoite (9.06×9.06mm, cushion cut)
Face-up size outline for 4ct Kyanite (9.03×9.03mm, cushion cut)
4ct Kyanite Cushion (9.03×9.03mm)
4ct Benitoite Cushion (9.06×9.06mm)
Difference: 0.7% (0.49 mm²)
4ct Benitoite (Cushion, 9.06×9.06mm) has approx. 0.7% more face-up area than 4ct Kyanite (Cushion, 9.03×9.03mm).


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