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2.51ct Sapphire (Pear, 9.72×9.42mm, Dark Blue) vs 0.35ct Diamond (Marquise, 7×4mm, White)


Quick summary: When looked from above (face-up position), 2.51ct Sapphire (9.72×9.42mm, pear cut) appears 3.4 times larger than 0.35ct Diamond (7×4mm, marquise cut). See below how they compare side-by-side on a ring and finger.

2.51ct Sapphire (pear cut)
vs
 0.35ct Diamond (marquise cut)
dark blue
 
white
9.72×9.42 mm 7×4 mm
actual size
Actual size of 2.51ct Sapphire (pear cut, 9.72×9.42mm, Dark Blue color)   Actual size of 0.35ct Diamond (marquise cut, 7×4mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Blue 2.51ct Sapphire (pear cut, 9.72×9.42mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.35ct Diamond (marquise cut, 7×4mm) 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
 56% vs 24%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2.51ct Sapphire Pear (9.72×9.42mm, Dark Blue) and 0.35ct Diamond Marquise (7×4mm, 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.


2.51 Ct Sapphire (Pear) 0.35 Ct Diamond (Marquise)
9.72×9.42 mm vs 7×4 mm
66.84 mm²   19.88 mm²
Face-up size outline for 2.51ct Sapphire (9.72×9.42mm, pear cut)
Face-up size outline for 0.35ct Diamond (7×4mm, marquise cut)
2.51ct Sapphire Pear (9.72×9.42mm)
0.35ct Diamond Marquise (7×4mm)
Difference: 236% (46.96 mm²)
2.51ct Sapphire (Pear, 9.72×9.42mm) has approx. 236% more face-up area than 0.35ct Diamond (Marquise, 7×4mm). In other words, it's 3.36x larger.


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