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6ct Spinel (Princess, 9.89×9.89mm, Red) vs 6ct Alexandrite (Princess, 9.77×9.77mm, Bluish Green)


Quick summary: When looked from above (face-up position), 6ct Spinel (9.89×9.89mm, princess cut) appears 2% larger than 6ct Alexandrite (9.77×9.77mm, princess cut). See below how they compare side-by-side on a ring and finger.

6ct Spinel (princess cut)
vs
 6ct Alexandrite (princess cut)
red
 
bluish green
9.89×9.89 mm 9.77×9.77 mm
actual size
Actual size of 6ct Spinel (princess cut, 9.89×9.89mm, Red color)   Actual size of 6ct Alexandrite (princess cut, 9.77×9.77mm, 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 6ct Spinel (princess cut, 9.89×9.89mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 6ct Alexandrite (princess cut, 9.77×9.77mm) 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
 59% vs 58%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 6ct Spinel Princess (9.89×9.89mm, Red) and 6ct Alexandrite Princess (9.77×9.77mm, 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.


6 Ct Spinel (Princess) 6 Ct Alexandrite (Princess)
9.89×9.89 mm vs 9.77×9.77 mm
97.81 mm²   95.45 mm²
Face-up size outline for 6ct Spinel (9.89×9.89mm, princess cut)
Face-up size outline for 6ct Alexandrite (9.77×9.77mm, princess cut)
6ct Spinel Princess (9.89×9.89mm)
6ct Alexandrite Princess (9.77×9.77mm)
Difference: 2% (2.36 mm²)
6ct Spinel (Princess, 9.89×9.89mm) has approx. 2% more face-up area than 6ct Alexandrite (Princess, 9.77×9.77mm).


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