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0.25ct Apatite (Round, 4.06×4.06mm, Green) vs 0.25ct Kyanite (Round, 3.87×3.87mm, Blue)


Quick summary: When looked from above (face-up position), 0.25ct Apatite (4.06×4.06mm, round cut) appears 10% larger than 0.25ct Kyanite (3.87×3.87mm, round cut). See below how they compare side-by-side on a ring and finger.

0.25ct Apatite (round cut)
vs
 0.25ct Kyanite (round cut)
green
 
blue
4.06×4.06 mm 3.87×3.87 mm
actual size
Actual size of 0.25ct Apatite (round cut, 4.06×4.06mm, Green color)   Actual size of 0.25ct Kyanite (round cut, 3.87×3.87mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.25ct Apatite (round cut, 4.06×4.06mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.25ct Kyanite (round cut, 3.87×3.87mm) 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
 25% vs 23%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.25ct Apatite Round (4.06×4.06mm, Green) and 0.25ct Kyanite Round (3.87×3.87mm, 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, Kyanite will face-up smaller than Apatite for a given carat weight, because it has higher specific gravity (3.68 vs. 3.2 - this means it's "heavier" compared to Apatite 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.


0.25 Ct Apatite (Round) 0.25 Ct Kyanite (Round)
4.06×4.06 mm vs 3.87×3.87 mm
12.95 mm²   11.76 mm²
Face-up size outline for 0.25ct Apatite (4.06×4.06mm, round cut)
Face-up size outline for 0.25ct Kyanite (3.87×3.87mm, round cut)
0.25ct Apatite Round (4.06×4.06mm)
0.25ct Kyanite Round (3.87×3.87mm)
Difference: 10% (1.19 mm²)
0.25ct Apatite (Round, 4.06×4.06mm) has approx. 10% more face-up area than 0.25ct Kyanite (Round, 3.87×3.87mm).


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