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30ct Benitoite (Oval, 24.56×16.37mm, Blue) vs 30ct Alexandrite (Oval, 24.39×16.26mm, Bluish Green)


Quick summary: When looked from above (face-up position), 30ct Benitoite (24.56×16.37mm, oval cut) appears 1% larger than 30ct Alexandrite (24.39×16.26mm, oval cut). See below how they compare side-by-side on a ring and finger.

30ct Benitoite (oval cut)
vs
 30ct Alexandrite (oval cut)
blue
 
bluish green
24.56×16.37 mm 24.39×16.26 mm
actual size
Actual size of 30ct Benitoite (oval cut, 24.56×16.37mm, Blue color)   Actual size of 30ct Alexandrite (oval cut, 24.39×16.26mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 30ct Benitoite (oval cut, 24.56×16.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 30ct Alexandrite (oval cut, 24.39×16.26mm) 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
 97% vs 97%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 30ct Benitoite Oval (24.56×16.37mm, Blue) and 30ct Alexandrite Oval (24.39×16.26mm, 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 slightly smaller than Benitoite for a given carat weight, because it has higher specific gravity (3.73 vs. 3.65 - this means it's "slightly heavier" compared to Benitoite 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.


30 Ct Benitoite (Oval) 30 Ct Alexandrite (Oval)
24.56×16.37 mm vs 24.39×16.26 mm
329.68 mm²   325.2 mm²
Face-up size outline for 30ct Benitoite (24.56×16.37mm, oval cut)
Face-up size outline for 30ct Alexandrite (24.39×16.26mm, oval cut)
30ct Benitoite Oval (24.56×16.37mm)
30ct Alexandrite Oval (24.39×16.26mm)
Difference: 1% (4.48 mm²)
30ct Benitoite (Oval, 24.56×16.37mm) has approx. 1% more face-up area than 30ct Alexandrite (Oval, 24.39×16.26mm).


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