×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

22ct Benitoite (Cabochon, 19.77×13.18mm, Blue) vs 22ct Alexandrite (Cabochon, 19.64×13.09mm, Bluish Green)


Quick summary: When looked from above (face-up position), 22ct Benitoite (19.77×13.18mm, cabochon cut) appears 1% larger than 22ct Alexandrite (19.64×13.09mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

22ct Benitoite (cabochon cut)
vs
 22ct Alexandrite (cabochon cut)
blue
 
bluish green
19.77×13.18 mm 19.64×13.09 mm
actual size
Actual size of 22ct Benitoite (cabochon cut, 19.77×13.18mm, Blue color)   Actual size of 22ct Alexandrite (cabochon cut, 19.64×13.09mm, 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 22ct Benitoite (cabochon cut, 19.77×13.18mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 22ct Alexandrite (cabochon cut, 19.64×13.09mm) 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
 78% vs 78%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 22ct Benitoite Cabochon (19.77×13.18mm, Blue) and 22ct Alexandrite Cabochon (19.64×13.09mm, 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.


22 Ct Benitoite (Cabochon) 22 Ct Alexandrite (Cabochon)
19.77×13.18 mm vs 19.64×13.09 mm
213.67 mm²   210.81 mm²
Face-up size outline for 22ct Benitoite (19.77×13.18mm, cabochon cut)
Face-up size outline for 22ct Alexandrite (19.64×13.09mm, cabochon cut)
22ct Benitoite Cabochon (19.77×13.18mm)
22ct Alexandrite Cabochon (19.64×13.09mm)
Difference: 1% (2.86 mm²)
22ct Benitoite (Cabochon, 19.77×13.18mm) has approx. 1% more face-up area than 22ct Alexandrite (Cabochon, 19.64×13.09mm).


Popular comparisons: