×
carat vs. color  length*  width*
  ×

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

2.5ct Alexandrite (Marquise, 13.5×6.75mm, Bluish Green) vs 2.5ct Sapphire (Marquise, 13.2×6.6mm, Blue)


Quick summary: When looked from above (face-up position), 2.5ct Alexandrite (13.5×6.75mm, marquise cut) appears 5% larger than 2.5ct Sapphire (13.2×6.6mm, marquise cut). See below how they compare side-by-side on a ring and finger.

2.5ct Alexandrite (marquise cut)
vs
 2.5ct Sapphire (marquise cut)
bluish green
 
blue
13.5×6.75 mm 13.2×6.6 mm
actual size
Actual size of 2.5ct Alexandrite (marquise cut, 13.5×6.75mm, Bluish Green color)   Actual size of 2.5ct Sapphire (marquise cut, 13.2×6.6mm, 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 2.5ct Alexandrite (marquise cut, 13.5×6.75mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2.5ct Sapphire (marquise cut, 13.2×6.6mm) 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
 40% vs 40%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.5ct Alexandrite Marquise (13.5×6.75mm, Bluish Green) and 2.5ct Sapphire Marquise (13.2×6.6mm, 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.


2.5 Ct Alexandrite (Marquise) 2.5 Ct Sapphire (Marquise)
13.5×6.75 mm vs 13.2×6.6 mm
64.7 mm²   61.86 mm²
Face-up size outline for 2.5ct Alexandrite (13.5×6.75mm, marquise cut)
Face-up size outline for 2.5ct Sapphire (13.2×6.6mm, marquise cut)
2.5ct Alexandrite Marquise (13.5×6.75mm)
2.5ct Sapphire Marquise (13.2×6.6mm)
Difference: 5% (2.84 mm²)
2.5ct Alexandrite (Marquise, 13.5×6.75mm) has approx. 5% more face-up area than 2.5ct Sapphire (Marquise, 13.2×6.6mm).


Popular comparisons: