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10ct Diamond (Pear, 19.49×11.74mm, White) vs 15ct Sapphire (Pear, 20.48×12.34mm, Blue)


Quick summary: When looked from above (face-up position), 15ct Sapphire (20.48×12.34mm, pear cut) appears 10% larger than 10ct Diamond (19.49×11.74mm, pear cut). See below how they compare side-by-side on a ring and finger.

10ct Diamond (pear cut)
vs
 15ct Sapphire (pear cut)
white
 
blue
19.49×11.74 mm 20.48×12.34 mm
actual size
Actual size of 10ct Diamond (pear cut, 19.49×11.74mm, White color)   Actual size of 15ct Sapphire (pear cut, 20.48×12.34mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 10ct Diamond (pear cut, 19.49×11.74mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 15ct Sapphire (pear cut, 20.48×12.34mm) 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
 70% vs 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Diamond Pear (19.49×11.74mm, White) and 15ct Sapphire Pear (20.48×12.34mm, 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.


10 Ct Diamond (Pear) 15 Ct Sapphire (Pear)
19.49×11.74 mm vs 20.48×12.34 mm
167.03 mm²   184.49 mm²
Face-up size outline for 15ct Sapphire (20.48×12.34mm, pear cut)
Face-up size outline for 10ct Diamond (19.49×11.74mm, pear cut)
10ct Diamond Pear (19.49×11.74mm)
15ct Sapphire Pear (20.48×12.34mm)
Difference: 10% (17.46 mm²)
15ct Sapphire (Pear, 20.48×12.34mm) has approx. 10% more face-up area than 10ct Diamond (Pear, 19.49×11.74mm).


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