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1.3ct Diamond (Pear, 9.88×5.95mm, White) vs 1.8ct Sapphire (Pear, 9.8×6.8mm, Dark Blue)


Quick summary: When looked from above (face-up position), 1.8ct Sapphire (9.8×6.8mm, pear cut) appears 13% larger than 1.3ct Diamond (9.88×5.95mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.3ct Diamond (pear cut)
vs
 1.8ct Sapphire (pear cut)
white
 
dark blue
9.88×5.95 mm 9.8×6.8 mm
actual size
Actual size of 1.3ct Diamond (pear cut, 9.88×5.95mm, White color)   Actual size of 1.8ct Sapphire (pear cut, 9.8×6.8mm, Dark Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.3ct Diamond (pear cut, 9.88×5.95mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Dark Blue 1.8ct Sapphire (pear cut, 9.8×6.8mm) 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
 36% vs 41%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.3ct Diamond Pear (9.88×5.95mm, White) and 1.8ct Sapphire Pear (9.8×6.8mm, Dark 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.


1.3 Ct Diamond (Pear) 1.8 Ct Sapphire (Pear)
9.88×5.95 mm vs 9.8×6.8 mm
42.91 mm²   48.65 mm²
Face-up size outline for 1.8ct Sapphire (9.8×6.8mm, pear cut)
Face-up size outline for 1.3ct Diamond (9.88×5.95mm, pear cut)
1.3ct Diamond Pear (9.88×5.95mm)
1.8ct Sapphire Pear (9.8×6.8mm)
Difference: 13% (5.74 mm²)
1.8ct Sapphire (Pear, 9.8×6.8mm) has approx. 13% more face-up area than 1.3ct Diamond (Pear, 9.88×5.95mm).


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