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3.5ct Kyanite (Cushion, 8.64×8.64mm, Blue) vs 3.5ct Benitoite (Cushion, 8.66×8.66mm, Blue)


Quick summary: When looked from above (face-up position), 3.5ct Benitoite (8.66×8.66mm, cushion cut) appears 0.5% larger than 3.5ct Kyanite (8.64×8.64mm, cushion cut). See below how they compare side-by-side on a ring and finger.

3.5ct Kyanite (cushion cut)
vs
 3.5ct Benitoite (cushion cut)
blue
 
blue
8.64×8.64 mm 8.66×8.66 mm
actual size
Actual size of 3.5ct Kyanite (cushion cut, 8.64×8.64mm, Blue color)   Actual size of 3.5ct Benitoite (cushion cut, 8.66×8.66mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3.5ct Kyanite (cushion cut, 8.64×8.64mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3.5ct Benitoite (cushion cut, 8.66×8.66mm) 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
 52% vs 52%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3.5ct Kyanite Cushion (8.64×8.64mm, Blue) and 3.5ct Benitoite Cushion (8.66×8.66mm, 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.


3.5 Ct Kyanite (Cushion) 3.5 Ct Benitoite (Cushion)
8.64×8.64 mm vs 8.66×8.66 mm
67.18 mm²   67.5 mm²
Face-up size outline for 3.5ct Benitoite (8.66×8.66mm, cushion cut)
Face-up size outline for 3.5ct Kyanite (8.64×8.64mm, cushion cut)
3.5ct Kyanite Cushion (8.64×8.64mm)
3.5ct Benitoite Cushion (8.66×8.66mm)
Difference: 0.5% (0.32 mm²)
3.5ct Benitoite (Cushion, 8.66×8.66mm) has approx. 0.5% more face-up area than 3.5ct Kyanite (Cushion, 8.64×8.64mm).


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