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20ct Kyanite (Emerald, 17.82×13.2mm, Blue) vs 20ct Sapphire (Emerald, 17.33×12.84mm, Blue)


Quick summary: When looked from above (face-up position), 20ct Kyanite (17.82×13.2mm, emerald cut) appears 6% larger than 20ct Sapphire (17.33×12.84mm, emerald cut). See below how they compare side-by-side on a ring and finger.

20ct Kyanite (emerald cut)
vs
 20ct Sapphire (emerald cut)
blue
 
blue
17.82×13.2 mm 17.33×12.84 mm
actual size
Actual size of 20ct Kyanite (emerald cut, 17.82×13.2mm, Blue color)   Actual size of 20ct Sapphire (emerald cut, 17.33×12.84mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 20ct Kyanite (emerald cut, 17.82×13.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 20ct Sapphire (emerald cut, 17.33×12.84mm) 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
 79% vs 76%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 20ct Kyanite Emerald (17.82×13.2mm, Blue) and 20ct Sapphire Emerald (17.33×12.84mm, 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.


20 Ct Kyanite (Emerald) 20 Ct Sapphire (Emerald)
17.82×13.2 mm vs 17.33×12.84 mm
218.76 mm²   206.94 mm²
Face-up size outline for 20ct Kyanite (17.82×13.2mm, emerald cut)
Face-up size outline for 20ct Sapphire (17.33×12.84mm, emerald cut)
20ct Kyanite Emerald (17.82×13.2mm)
20ct Sapphire Emerald (17.33×12.84mm)
Difference: 6% (11.82 mm²)
20ct Kyanite (Emerald, 17.82×13.2mm) has approx. 6% more face-up area than 20ct Sapphire (Emerald, 17.33×12.84mm).


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