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4.5ct Kyanite (Radiant, 9.35×9.35mm, Blue) vs 4.5ct Benitoite (Radiant, 9.38×9.38mm, Blue)


Quick summary: When looked from above (face-up position), 4.5ct Benitoite (9.38×9.38mm, radiant cut) appears 0.7% larger than 4.5ct Kyanite (9.35×9.35mm, radiant cut). See below how they compare side-by-side on a ring and finger.

4.5ct Kyanite (radiant cut)
vs
 4.5ct Benitoite (radiant cut)
blue
 
blue
9.35×9.35 mm 9.38×9.38 mm
actual size
Actual size of 4.5ct Kyanite (radiant cut, 9.35×9.35mm, Blue color)   Actual size of 4.5ct Benitoite (radiant cut, 9.38×9.38mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4.5ct Kyanite (radiant cut, 9.35×9.35mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 4.5ct Benitoite (radiant cut, 9.38×9.38mm) 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 4.5ct Kyanite Radiant (9.35×9.35mm, Blue) and 4.5ct Benitoite Radiant (9.38×9.38mm, 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.


4.5 Ct Kyanite (Radiant) 4.5 Ct Benitoite (Radiant)
9.35×9.35 mm vs 9.38×9.38 mm
83.05 mm²   83.59 mm²
Face-up size outline for 4.5ct Benitoite (9.38×9.38mm, radiant cut)
Face-up size outline for 4.5ct Kyanite (9.35×9.35mm, radiant cut)
4.5ct Kyanite Radiant (9.35×9.35mm)
4.5ct Benitoite Radiant (9.38×9.38mm)
Difference: 0.7% (0.54 mm²)
4.5ct Benitoite (Radiant, 9.38×9.38mm) has approx. 0.7% more face-up area than 4.5ct Kyanite (Radiant, 9.35×9.35mm).


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