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2.5ct Kyanite (Trillion, 10.2×10.2mm, Blue) vs 2.5ct Benitoite (Trillion, 10.23×10.23mm, Blue)


Quick summary: When looked from above (face-up position), 2.5ct Benitoite (10.23×10.23mm, trillion cut) appears 0.6% larger than 2.5ct Kyanite (10.2×10.2mm, trillion cut). See below how they compare side-by-side on a ring and finger.

2.5ct Kyanite (trillion cut)
vs
 2.5ct Benitoite (trillion cut)
blue
 
blue
10.2×10.2 mm 10.23×10.23 mm
actual size
Actual size of 2.5ct Kyanite (trillion cut, 10.2×10.2mm, Blue color)   Actual size of 2.5ct Benitoite (trillion cut, 10.23×10.23mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 2.5ct Kyanite (trillion cut, 10.2×10.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2.5ct Benitoite (trillion cut, 10.23×10.23mm) 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
 61% vs 61%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.5ct Kyanite Trillion (10.2×10.2mm, Blue) and 2.5ct Benitoite Trillion (10.23×10.23mm, 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.


2.5 Ct Kyanite (Trillion) 2.5 Ct Benitoite (Trillion)
10.2×10.2 mm vs 10.23×10.23 mm
64.5 mm²   64.88 mm²
Face-up size outline for 2.5ct Benitoite (10.23×10.23mm, trillion cut)
Face-up size outline for 2.5ct Kyanite (10.2×10.2mm, trillion cut)
2.5ct Kyanite Trillion (10.2×10.2mm)
2.5ct Benitoite Trillion (10.23×10.23mm)
Difference: 0.6% (0.38 mm²)
2.5ct Benitoite (Trillion, 10.23×10.23mm) has approx. 0.6% more face-up area than 2.5ct Kyanite (Trillion, 10.2×10.2mm).


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