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5.5ct Spinel (Pear, 15.55×9.37mm, Red) vs 5.5ct Alexandrite (Pear, 15.37×9.26mm, Bluish Green)


Quick summary: When looked from above (face-up position), 5.5ct Spinel (15.55×9.37mm, pear cut) appears 2% larger than 5.5ct Alexandrite (15.37×9.26mm, pear cut). See below how they compare side-by-side on a ring and finger.

5.5ct Spinel (pear cut)
vs
 5.5ct Alexandrite (pear cut)
red
 
bluish green
15.55×9.37 mm 15.37×9.26 mm
actual size
Actual size of 5.5ct Spinel (pear cut, 15.55×9.37mm, Red color)   Actual size of 5.5ct Alexandrite (pear cut, 15.37×9.26mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 5.5ct Spinel (pear cut, 15.55×9.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 5.5ct Alexandrite (pear cut, 15.37×9.26mm) 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 55%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5.5ct Spinel Pear (15.55×9.37mm, Red) and 5.5ct Alexandrite Pear (15.37×9.26mm, Bluish Green) 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, Alexandrite will face-up smaller than Spinel for a given carat weight, because it has higher specific gravity (3.73 vs. 3.6 - this means it's "heavier" compared to Spinel 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.


5.5 Ct Spinel (Pear) 5.5 Ct Alexandrite (Pear)
15.55×9.37 mm vs 15.37×9.26 mm
106.36 mm²   103.9 mm²
Face-up size outline for 5.5ct Spinel (15.55×9.37mm, pear cut)
Face-up size outline for 5.5ct Alexandrite (15.37×9.26mm, pear cut)
5.5ct Spinel Pear (15.55×9.37mm)
5.5ct Alexandrite Pear (15.37×9.26mm)
Difference: 2% (2.46 mm²)
5.5ct Spinel (Pear, 15.55×9.37mm) has approx. 2% more face-up area than 5.5ct Alexandrite (Pear, 15.37×9.26mm).


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