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8.5ct Kyanite (Oval, 16.1×10.73mm, Blue) vs 8.5ct Benitoite (Oval, 16.13×10.75mm, Blue)


Quick summary: When looked from above (face-up position), 8.5ct Benitoite (16.13×10.75mm, oval cut) appears 0.4% larger than 8.5ct Kyanite (16.1×10.73mm, oval cut). See below how they compare side-by-side on a ring and finger.

8.5ct Kyanite (oval cut)
vs
 8.5ct Benitoite (oval cut)
blue
 
blue
16.1×10.73 mm 16.13×10.75 mm
actual size
Actual size of 8.5ct Kyanite (oval cut, 16.1×10.73mm, Blue color)   Actual size of 8.5ct Benitoite (oval cut, 16.13×10.75mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 8.5ct Kyanite (oval cut, 16.1×10.73mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8.5ct Benitoite (oval cut, 16.13×10.75mm) 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
 64% vs 64%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 8.5ct Kyanite Oval (16.1×10.73mm, Blue) and 8.5ct Benitoite Oval (16.13×10.75mm, 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.


8.5 Ct Kyanite (Oval) 8.5 Ct Benitoite (Oval)
16.1×10.73 mm vs 16.13×10.75 mm
141.66 mm²   142.19 mm²
Face-up size outline for 8.5ct Benitoite (16.13×10.75mm, oval cut)
Face-up size outline for 8.5ct Kyanite (16.1×10.73mm, oval cut)
8.5ct Kyanite Oval (16.1×10.73mm)
8.5ct Benitoite Oval (16.13×10.75mm)
Difference: 0.4% (0.53 mm²)
8.5ct Benitoite (Oval, 16.13×10.75mm) has approx. 0.4% more face-up area than 8.5ct Kyanite (Oval, 16.1×10.73mm).


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