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3ct Kyanite (Cabochon, 10.16×6.77mm, Blue) vs 3ct Benitoite (Cabochon, 10.17×6.78mm, Blue)


Quick summary: When looked from above (face-up position), 3ct Benitoite (10.17×6.78mm, cabochon cut) appears 0.2% larger than 3ct Kyanite (10.16×6.77mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

3ct Kyanite (cabochon cut)
vs
 3ct Benitoite (cabochon cut)
blue
 
blue
10.16×6.77 mm 10.17×6.78 mm
actual size
Actual size of 3ct Kyanite (cabochon cut, 10.16×6.77mm, Blue color)   Actual size of 3ct Benitoite (cabochon cut, 10.17×6.78mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Kyanite (cabochon cut, 10.16×6.77mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3ct Benitoite (cabochon cut, 10.17×6.78mm) 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
 41% vs 41%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Kyanite Cabochon (10.16×6.77mm, Blue) and 3ct Benitoite Cabochon (10.17×6.78mm, 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 Ct Kyanite (Cabochon) 3 Ct Benitoite (Cabochon)
10.16×6.77 mm vs 10.17×6.78 mm
56.4 mm²   56.54 mm²
Face-up size outline for 3ct Benitoite (10.17×6.78mm, cabochon cut)
Face-up size outline for 3ct Kyanite (10.16×6.77mm, cabochon cut)
3ct Kyanite Cabochon (10.16×6.77mm)
3ct Benitoite Cabochon (10.17×6.78mm)
Difference: 0.2% (0.14 mm²)
3ct Benitoite (Cabochon, 10.17×6.78mm) has approx. 0.2% more face-up area than 3ct Kyanite (Cabochon, 10.16×6.77mm).


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