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17ct Kyanite (Marquise, 25.7×12.85mm, Blue) vs 17ct Sapphire (Marquise, 25×12.5mm, Blue)


Quick summary: When looked from above (face-up position), 17ct Kyanite (25.7×12.85mm, marquise cut) appears 6% larger than 17ct Sapphire (25×12.5mm, marquise cut). See below how they compare side-by-side on a ring and finger.

17ct Kyanite (marquise cut)
vs
 17ct Sapphire (marquise cut)
blue
 
blue
25.7×12.85 mm 25×12.5 mm
actual size
Actual size of 17ct Kyanite (marquise cut, 25.7×12.85mm, Blue color)   Actual size of 17ct Sapphire (marquise cut, 25×12.5mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 17ct Kyanite (marquise cut, 25.7×12.85mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 17ct Sapphire (marquise cut, 25×12.5mm) 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
 77% vs 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 17ct Kyanite Marquise (25.7×12.85mm, Blue) and 17ct Sapphire Marquise (25×12.5mm, 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.


17 Ct Kyanite (Marquise) 17 Ct Sapphire (Marquise)
25.7×12.85 mm vs 25×12.5 mm
234.47 mm²   221.88 mm²
Face-up size outline for 17ct Kyanite (25.7×12.85mm, marquise cut)
Face-up size outline for 17ct Sapphire (25×12.5mm, marquise cut)
17ct Kyanite Marquise (25.7×12.85mm)
17ct Sapphire Marquise (25×12.5mm)
Difference: 6% (12.59 mm²)
17ct Kyanite (Marquise, 25.7×12.85mm) has approx. 6% more face-up area than 17ct Sapphire (Marquise, 25×12.5mm).


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