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4ct Kyanite (Emerald, 10.42×7.72mm, Light Bluish Green) vs 3.5ct Diamond (Emerald, 10.14×7.51mm, White)


Quick summary: When looked from above (face-up position), 4ct Kyanite (10.42×7.72mm, emerald cut) appears 6% larger than 3.5ct Diamond (10.14×7.51mm, emerald cut). See below how they compare side-by-side on a ring and finger.

4ct Kyanite (emerald cut)
vs
 3.5ct Diamond (emerald cut)
light bluish green
 
white
10.42×7.72 mm 10.14×7.51 mm
actual size
Actual size of 4ct Kyanite (emerald cut, 10.42×7.72mm, Light Bluish Green color)   Actual size of 3.5ct Diamond (emerald cut, 10.14×7.51mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Bluish Green 4ct Kyanite (emerald cut, 10.42×7.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 3.5ct Diamond (emerald cut, 10.14×7.51mm) 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
 46% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Kyanite Emerald (10.42×7.72mm, Light Bluish Green) and 3.5ct Diamond Emerald (10.14×7.51mm, White) 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, Kyanite will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (3.68 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


4 Ct Kyanite (Emerald) 3.5 Ct Diamond (Emerald)
10.42×7.72 mm vs 10.14×7.51 mm
74.81 mm²   70.82 mm²
Face-up size outline for 4ct Kyanite (10.42×7.72mm, emerald cut)
Face-up size outline for 3.5ct Diamond (10.14×7.51mm, emerald cut)
4ct Kyanite Emerald (10.42×7.72mm)
3.5ct Diamond Emerald (10.14×7.51mm)
Difference: 6% (3.99 mm²)
4ct Kyanite (Emerald, 10.42×7.72mm) has approx. 6% more face-up area than 3.5ct Diamond (Emerald, 10.14×7.51mm).


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