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28ct Kyanite (Round, 18.67×18.67mm, Blue) vs 28ct Sapphire (Round, 18.15×18.15mm, Blue)


Quick summary: When looked from above (face-up position), 28ct Kyanite (18.67×18.67mm, round cut) appears 6% larger than 28ct Sapphire (18.15×18.15mm, round cut). See below how they compare side-by-side on a ring and finger.

28ct Kyanite (round cut)
vs
 28ct Sapphire (round cut)
blue
 
blue
18.67×18.67 mm 18.15×18.15 mm
actual size
Actual size of 28ct Kyanite (round cut, 18.67×18.67mm, Blue color)   Actual size of 28ct Sapphire (round cut, 18.15×18.15mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 28ct Kyanite (round cut, 18.67×18.67mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 28ct Sapphire (round cut, 18.15×18.15mm) 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
 111% vs 108%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 28ct Kyanite Round (18.67×18.67mm, Blue) and 28ct Sapphire Round (18.15×18.15mm, 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.


28 Ct Kyanite (Round) 28 Ct Sapphire (Round)
18.67×18.67 mm vs 18.15×18.15 mm
273.77 mm²   258.73 mm²
Face-up size outline for 28ct Kyanite (18.67×18.67mm, round cut)
Face-up size outline for 28ct Sapphire (18.15×18.15mm, round cut)
28ct Kyanite Round (18.67×18.67mm)
28ct Sapphire Round (18.15×18.15mm)
Difference: 6% (15.04 mm²)
28ct Kyanite (Round, 18.67×18.67mm) has approx. 6% more face-up area than 28ct Sapphire (Round, 18.15×18.15mm).


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