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1.03ct Diamond (Pear, 9.13×5.5mm, White) vs 4ct Sapphire (Cushion, 9.65×7.5mm, Blue)


Quick summary: When looked from above (face-up position), 4ct Sapphire (9.65×7.5mm, cushion cut) appears 78% larger than 1.03ct Diamond (9.13×5.5mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.03ct Diamond (pear cut)
vs
 4ct Sapphire (cushion cut)
white
 
blue
9.13×5.5 mm 9.65×7.5 mm
actual size
Actual size of 1.03ct Diamond (pear cut, 9.13×5.5mm, White color)   Actual size of 4ct Sapphire (cushion cut, 9.65×7.5mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.03ct Diamond (pear cut, 9.13×5.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 4ct Sapphire (cushion cut, 9.65×7.5mm) 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
 33% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.03ct Diamond Pear (9.13×5.5mm, White) and 4ct Sapphire Cushion (9.65×7.5mm, 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 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.


1.03 Ct Diamond (Pear) 4 Ct Sapphire (Cushion)
9.13×5.5 mm vs 9.65×7.5 mm
36.66 mm²   65.14 mm²
Face-up size outline for 4ct Sapphire (9.65×7.5mm, cushion cut)
Face-up size outline for 1.03ct Diamond (9.13×5.5mm, pear cut)
1.03ct Diamond Pear (9.13×5.5mm)
4ct Sapphire Cushion (9.65×7.5mm)
Difference: 78% (28.48 mm²)
4ct Sapphire (Cushion, 9.65×7.5mm) has approx. 78% more face-up area than 1.03ct Diamond (Pear, 9.13×5.5mm).


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