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6.5ct Kyanite (Cushion, 10.62×10.62mm, Blue) vs 6.5ct Benitoite (Cushion, 10.65×10.65mm, Blue)


Quick summary: When looked from above (face-up position), 6.5ct Benitoite (10.65×10.65mm, cushion cut) appears 0.6% larger than 6.5ct Kyanite (10.62×10.62mm, cushion cut). See below how they compare side-by-side on a ring and finger.

6.5ct Kyanite (cushion cut)
vs
 6.5ct Benitoite (cushion cut)
blue
 
blue
10.62×10.62 mm 10.65×10.65 mm
actual size
Actual size of 6.5ct Kyanite (cushion cut, 10.62×10.62mm, Blue color)   Actual size of 6.5ct Benitoite (cushion cut, 10.65×10.65mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 6.5ct Kyanite (cushion cut, 10.62×10.62mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 6.5ct Benitoite (cushion cut, 10.65×10.65mm) 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 64%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 6.5ct Kyanite Cushion (10.62×10.62mm, Blue) and 6.5ct Benitoite Cushion (10.65×10.65mm, 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.


6.5 Ct Kyanite (Cushion) 6.5 Ct Benitoite (Cushion)
10.62×10.62 mm vs 10.65×10.65 mm
101.51 mm²   102.08 mm²
Face-up size outline for 6.5ct Benitoite (10.65×10.65mm, cushion cut)
Face-up size outline for 6.5ct Kyanite (10.62×10.62mm, cushion cut)
6.5ct Kyanite Cushion (10.62×10.62mm)
6.5ct Benitoite Cushion (10.65×10.65mm)
Difference: 0.6% (0.57 mm²)
6.5ct Benitoite (Cushion, 10.65×10.65mm) has approx. 0.6% more face-up area than 6.5ct Kyanite (Cushion, 10.62×10.62mm).


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