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0.35ct Diamond (Princess, 3.88×3.88mm, White) vs 0.9ct Sapphire (Oval, 7.31×4.87mm, Blue)


Quick summary: When looked from above (face-up position), 0.9ct Sapphire (7.31×4.87mm, oval cut) appears 94% larger than 0.35ct Diamond (3.88×3.88mm, princess cut). See below how they compare side-by-side on a ring and finger.

0.35ct Diamond (princess cut)
vs
 0.9ct Sapphire (oval cut)
white
 
blue
3.88×3.88 mm 7.31×4.87 mm
actual size
Actual size of 0.35ct Diamond (princess cut, 3.88×3.88mm, White color)   Actual size of 0.9ct Sapphire (oval cut, 7.31×4.87mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.35ct Diamond (princess cut, 3.88×3.88mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.9ct Sapphire (oval cut, 7.31×4.87mm) 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
 23% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.35ct Diamond Princess (3.88×3.88mm, White) and 0.9ct Sapphire Oval (7.31×4.87mm, 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, 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.


0.35 Ct Diamond (Princess) 0.9 Ct Sapphire (Oval)
3.88×3.88 mm vs 7.31×4.87 mm
15.05 mm²   29.19 mm²
Face-up size outline for 0.9ct Sapphire (7.31×4.87mm, oval cut)
Face-up size outline for 0.35ct Diamond (3.88×3.88mm, princess cut)
0.35ct Diamond Princess (3.88×3.88mm)
0.9ct Sapphire Oval (7.31×4.87mm)
Difference: 94% (14.14 mm²)
0.9ct Sapphire (Oval, 7.31×4.87mm) has approx. 94% more face-up area than 0.35ct Diamond (Princess, 3.88×3.88mm).


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