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17ct Kyanite (Round, 15.81×15.81mm, Blue) vs 17ct Sapphire (Round, 15.37×15.37mm, Blue)


Quick summary: When looked from above (face-up position), 17ct Kyanite (15.81×15.81mm, round cut) appears 6% larger than 17ct Sapphire (15.37×15.37mm, round cut). See below how they compare side-by-side on a ring and finger.

17ct Kyanite (round cut)
vs
 17ct Sapphire (round cut)
blue
 
blue
15.81×15.81 mm 15.37×15.37 mm
actual size
Actual size of 17ct Kyanite (round cut, 15.81×15.81mm, Blue color)   Actual size of 17ct Sapphire (round cut, 15.37×15.37mm, 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 (round cut, 15.81×15.81mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 17ct Sapphire (round cut, 15.37×15.37mm) 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
 94% vs 91%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 17ct Kyanite Round (15.81×15.81mm, Blue) and 17ct Sapphire Round (15.37×15.37mm, 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 (Round) 17 Ct Sapphire (Round)
15.81×15.81 mm vs 15.37×15.37 mm
196.32 mm²   185.54 mm²
Face-up size outline for 17ct Kyanite (15.81×15.81mm, round cut)
Face-up size outline for 17ct Sapphire (15.37×15.37mm, round cut)
17ct Kyanite Round (15.81×15.81mm)
17ct Sapphire Round (15.37×15.37mm)
Difference: 6% (10.78 mm²)
17ct Kyanite (Round, 15.81×15.81mm) has approx. 6% more face-up area than 17ct Sapphire (Round, 15.37×15.37mm).


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