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3.5ct Kyanite (Round, 9.33×9.33mm, Blue) vs 3.5ct Benitoite (Round, 9.36×9.36mm, Blue)


Quick summary: When looked from above (face-up position), 3.5ct Benitoite (9.36×9.36mm, round cut) appears 0.6% larger than 3.5ct Kyanite (9.33×9.33mm, round cut). See below how they compare side-by-side on a ring and finger.

3.5ct Kyanite (round cut)
vs
 3.5ct Benitoite (round cut)
blue
 
blue
9.33×9.33 mm 9.36×9.36 mm
actual size
Actual size of 3.5ct Kyanite (round cut, 9.33×9.33mm, Blue color)   Actual size of 3.5ct Benitoite (round cut, 9.36×9.36mm, 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 (round cut, 9.33×9.33mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3.5ct Benitoite (round cut, 9.36×9.36mm) 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
 56% vs 56%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3.5ct Kyanite Round (9.33×9.33mm, Blue) and 3.5ct Benitoite Round (9.36×9.36mm, 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 (Round) 3.5 Ct Benitoite (Round)
9.33×9.33 mm vs 9.36×9.36 mm
68.37 mm²   68.81 mm²
Face-up size outline for 3.5ct Benitoite (9.36×9.36mm, round cut)
Face-up size outline for 3.5ct Kyanite (9.33×9.33mm, round cut)
3.5ct Kyanite Round (9.33×9.33mm)
3.5ct Benitoite Round (9.36×9.36mm)
Difference: 0.6% (0.44 mm²)
3.5ct Benitoite (Round, 9.36×9.36mm) has approx. 0.6% more face-up area than 3.5ct Kyanite (Round, 9.33×9.33mm).


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