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5.7ct Sapphire (Cushion, 9.99×9.99mm, Blue) vs 0.25ct Diamond (Trillion, 4.87×4.87mm, White)


Quick summary: When looked from above (face-up position), 5.7ct Sapphire (9.99×9.99mm, cushion cut) appears 6.1 times larger than 0.25ct Diamond (4.87×4.87mm, trillion cut). See below how they compare side-by-side on a ring and finger.

5.7ct Sapphire (cushion cut)
vs
 0.25ct Diamond (trillion cut)
blue
 
white
9.99×9.99 mm 4.87×4.87 mm
actual size
Actual size of 5.7ct Sapphire (cushion cut, 9.99×9.99mm, Blue color)   Actual size of 0.25ct Diamond (trillion cut, 4.87×4.87mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 5.7ct Sapphire (cushion cut, 9.99×9.99mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.25ct Diamond (trillion cut, 4.87×4.87mm) 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
 60% vs 29%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 5.7ct Sapphire Cushion (9.99×9.99mm, Blue) and 0.25ct Diamond Trillion (4.87×4.87mm, 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, Sapphire will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (4 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.


5.7 Ct Sapphire (Cushion) 0.25 Ct Diamond (Trillion)
9.99×9.99 mm vs 4.87×4.87 mm
89.82 mm²   14.7 mm²
Face-up size outline for 5.7ct Sapphire (9.99×9.99mm, cushion cut)
Face-up size outline for 0.25ct Diamond (4.87×4.87mm, trillion cut)
5.7ct Sapphire Cushion (9.99×9.99mm)
0.25ct Diamond Trillion (4.87×4.87mm)
Difference: 511% (75.12 mm²)
5.7ct Sapphire (Cushion, 9.99×9.99mm) has approx. 511% more face-up area than 0.25ct Diamond (Trillion, 4.87×4.87mm). In other words, it's 6.11x larger.


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