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8.5ct Kyanite (Emerald, 13.41×9.93mm, Blue) vs 8.5ct Benitoite (Emerald, 13.43×9.95mm, Blue)


Quick summary: When looked from above (face-up position), 8.5ct Benitoite (13.43×9.95mm, emerald cut) appears 0.3% larger than 8.5ct Kyanite (13.41×9.93mm, emerald cut). See below how they compare side-by-side on a ring and finger.

8.5ct Kyanite (emerald cut)
vs
 8.5ct Benitoite (emerald cut)
blue
 
blue
13.41×9.93 mm 13.43×9.95 mm
actual size
Actual size of 8.5ct Kyanite (emerald cut, 13.41×9.93mm, Blue color)   Actual size of 8.5ct Benitoite (emerald cut, 13.43×9.95mm, 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 (emerald cut, 13.41×9.93mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8.5ct Benitoite (emerald cut, 13.43×9.95mm) 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
 59% vs 59%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 8.5ct Kyanite Emerald (13.41×9.93mm, Blue) and 8.5ct Benitoite Emerald (13.43×9.95mm, 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 (Emerald) 8.5 Ct Benitoite (Emerald)
13.41×9.93 mm vs 13.43×9.95 mm
123.84 mm²   124.27 mm²
Face-up size outline for 8.5ct Benitoite (13.43×9.95mm, emerald cut)
Face-up size outline for 8.5ct Kyanite (13.41×9.93mm, emerald cut)
8.5ct Kyanite Emerald (13.41×9.93mm)
8.5ct Benitoite Emerald (13.43×9.95mm)
Difference: 0.3% (0.43 mm²)
8.5ct Benitoite (Emerald, 13.43×9.95mm) has approx. 0.3% more face-up area than 8.5ct Kyanite (Emerald, 13.41×9.93mm).


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