×
carat vs. color  length*  width*
  ×

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

10ct Alexandrite (Radiant, 12.15×12.15mm, Bluish Green) vs 10ct Sapphire (Radiant, 11.87×11.87mm, Blue)


Quick summary: When looked from above (face-up position), 10ct Alexandrite (12.15×12.15mm, radiant cut) appears 5% larger than 10ct Sapphire (11.87×11.87mm, radiant cut). See below how they compare side-by-side on a ring and finger.

10ct Alexandrite (radiant cut)
vs
 10ct Sapphire (radiant cut)
bluish green
 
blue
12.15×12.15 mm 11.87×11.87 mm
actual size
Actual size of 10ct Alexandrite (radiant cut, 12.15×12.15mm, Bluish Green color)   Actual size of 10ct Sapphire (radiant cut, 11.87×11.87mm, 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 10ct Alexandrite (radiant cut, 12.15×12.15mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Sapphire (radiant cut, 11.87×11.87mm) 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
 72% vs 71%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 10ct Alexandrite Radiant (12.15×12.15mm, Bluish Green) and 10ct Sapphire Radiant (11.87×11.87mm, 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.


10 Ct Alexandrite (Radiant) 10 Ct Sapphire (Radiant)
12.15×12.15 mm vs 11.87×11.87 mm
140.24 mm²   133.85 mm²
Face-up size outline for 10ct Alexandrite (12.15×12.15mm, radiant cut)
Face-up size outline for 10ct Sapphire (11.87×11.87mm, radiant cut)
10ct Alexandrite Radiant (12.15×12.15mm)
10ct Sapphire Radiant (11.87×11.87mm)
Difference: 5% (6.39 mm²)
10ct Alexandrite (Radiant, 12.15×12.15mm) has approx. 5% more face-up area than 10ct Sapphire (Radiant, 11.87×11.87mm).


Popular comparisons: