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6ct Kyanite (Marquise, 18.16×9.08mm, Blue) vs 6ct Benitoite (Marquise, 18.22×9.11mm, Blue)


Quick summary: When looked from above (face-up position), 6ct Benitoite (18.22×9.11mm, marquise cut) appears 0.7% larger than 6ct Kyanite (18.16×9.08mm, marquise cut). See below how they compare side-by-side on a ring and finger.

6ct Kyanite (marquise cut)
vs
 6ct Benitoite (marquise cut)
blue
 
blue
18.16×9.08 mm 18.22×9.11 mm
actual size
Actual size of 6ct Kyanite (marquise cut, 18.16×9.08mm, Blue color)   Actual size of 6ct Benitoite (marquise cut, 18.22×9.11mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 6ct Kyanite (marquise cut, 18.16×9.08mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 6ct Benitoite (marquise cut, 18.22×9.11mm) 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
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Actual sizes of 6ct Kyanite Marquise (18.16×9.08mm, Blue) and 6ct Benitoite Marquise (18.22×9.11mm, 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 Ct Kyanite (Marquise) 6 Ct Benitoite (Marquise)
18.16×9.08 mm vs 18.22×9.11 mm
117.07 mm²   117.85 mm²
Face-up size outline for 6ct Benitoite (18.22×9.11mm, marquise cut)
Face-up size outline for 6ct Kyanite (18.16×9.08mm, marquise cut)
6ct Kyanite Marquise (18.16×9.08mm)
6ct Benitoite Marquise (18.22×9.11mm)
Difference: 0.7% (0.78 mm²)
6ct Benitoite (Marquise, 18.22×9.11mm) has approx. 0.7% more face-up area than 6ct Kyanite (Marquise, 18.16×9.08mm).


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