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18ct Kyanite (Baguette, 18.68×12.45mm, Blue) vs 18ct Sapphire (Baguette, 18.17×12.11mm, Blue)


Quick summary: When looked from above (face-up position), 18ct Kyanite (18.68×12.45mm, baguette cut) appears 6% larger than 18ct Sapphire (18.17×12.11mm, baguette cut). See below how they compare side-by-side on a ring and finger.

18ct Kyanite (baguette cut)
vs
 18ct Sapphire (baguette cut)
blue
 
blue
18.68×12.45 mm 18.17×12.11 mm
actual size
Actual size of 18ct Kyanite (baguette cut, 18.68×12.45mm, Blue color)   Actual size of 18ct Sapphire (baguette cut, 18.17×12.11mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 18ct Kyanite (baguette cut, 18.68×12.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 18ct Sapphire (baguette cut, 18.17×12.11mm) 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
 74% vs 72%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 18ct Kyanite Baguette (18.68×12.45mm, Blue) and 18ct Sapphire Baguette (18.17×12.11mm, 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, Sapphire will face-up smaller than Kyanite for a given carat weight, because it has higher specific gravity (4 vs. 3.68 - this means it's "heavier" compared to Kyanite 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.


18 Ct Kyanite (Baguette) 18 Ct Sapphire (Baguette)
18.68×12.45 mm vs 18.17×12.11 mm
232.57 mm²   220.04 mm²
Face-up size outline for 18ct Kyanite (18.68×12.45mm, baguette cut)
Face-up size outline for 18ct Sapphire (18.17×12.11mm, baguette cut)
18ct Kyanite Baguette (18.68×12.45mm)
18ct Sapphire Baguette (18.17×12.11mm)
Difference: 6% (12.53 mm²)
18ct Kyanite (Baguette, 18.68×12.45mm) has approx. 6% more face-up area than 18ct Sapphire (Baguette, 18.17×12.11mm).


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