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9ct Alexandrite (Pear, 18.11×10.91mm, Bluish Green) vs 9ct Sapphire (Pear, 17.7×10.66mm, Blue)


Quick summary: When looked from above (face-up position), 9ct Alexandrite (18.11×10.91mm, pear cut) appears 5% larger than 9ct Sapphire (17.7×10.66mm, pear cut). See below how they compare side-by-side on a ring and finger.

9ct Alexandrite (pear cut)
vs
 9ct Sapphire (pear cut)
bluish green
 
blue
18.11×10.91 mm 17.7×10.66 mm
actual size
Actual size of 9ct Alexandrite (pear cut, 18.11×10.91mm, Bluish Green color)   Actual size of 9ct Sapphire (pear cut, 17.7×10.66mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 9ct Alexandrite (pear cut, 18.11×10.91mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 9ct Sapphire (pear cut, 17.7×10.66mm) 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
 65% vs 64%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 9ct Alexandrite Pear (18.11×10.91mm, Bluish Green) and 9ct Sapphire Pear (17.7×10.66mm, 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 Alexandrite for a given carat weight, because it has higher specific gravity (4 vs. 3.73 - this means it's "heavier" compared to Alexandrite 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.


9 Ct Alexandrite (Pear) 9 Ct Sapphire (Pear)
18.11×10.91 mm vs 17.7×10.66 mm
144.23 mm²   137.74 mm²
Face-up size outline for 9ct Alexandrite (18.11×10.91mm, pear cut)
Face-up size outline for 9ct Sapphire (17.7×10.66mm, pear cut)
9ct Alexandrite Pear (18.11×10.91mm)
9ct Sapphire Pear (17.7×10.66mm)
Difference: 5% (6.49 mm²)
9ct Alexandrite (Pear, 18.11×10.91mm) has approx. 5% more face-up area than 9ct Sapphire (Pear, 17.7×10.66mm).


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