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1ct Apatite (Trillion, 7.87×7.87mm, Green) vs 1ct Kyanite (Trillion, 7.52×7.52mm, Blue)


Quick summary: When looked from above (face-up position), 1ct Apatite (7.87×7.87mm, trillion cut) appears 10% larger than 1ct Kyanite (7.52×7.52mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1ct Apatite (trillion cut)
vs
 1ct Kyanite (trillion cut)
green
 
blue
7.87×7.87 mm 7.52×7.52 mm
actual size
Actual size of 1ct Apatite (trillion cut, 7.87×7.87mm, Green color)   Actual size of 1ct Kyanite (trillion cut, 7.52×7.52mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 1ct Apatite (trillion cut, 7.87×7.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1ct Kyanite (trillion cut, 7.52×7.52mm) 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
 47% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Apatite Trillion (7.87×7.87mm, Green) and 1ct Kyanite Trillion (7.52×7.52mm, 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.


1 Ct Apatite (Trillion) 1 Ct Kyanite (Trillion)
7.87×7.87 mm vs 7.52×7.52 mm
38.4 mm²   35.06 mm²
Face-up size outline for 1ct Apatite (7.87×7.87mm, trillion cut)
Face-up size outline for 1ct Kyanite (7.52×7.52mm, trillion cut)
1ct Apatite Trillion (7.87×7.87mm)
1ct Kyanite Trillion (7.52×7.52mm)
Difference: 10% (3.34 mm²)
1ct Apatite (Trillion, 7.87×7.87mm) has approx. 10% more face-up area than 1ct Kyanite (Trillion, 7.52×7.52mm).


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