×
carat vs. color  length*  width*
  ×

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

1ct Alexandrite (Round, 6.14×6.14mm, Dark Purple) vs 1ct Sapphire (Emerald, 6.39×4.73mm, Light Green )


Quick summary: When looked from above (face-up position), 1ct Alexandrite (6.14×6.14mm, round cut) appears 5% larger than 1ct Sapphire (6.39×4.73mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1ct Alexandrite (round cut)
vs
 1ct Sapphire (emerald cut)
dark purple
 
light green
6.14×6.14 mm 6.39×4.73 mm
actual size
Actual size of 1ct Alexandrite (round cut, 6.14×6.14mm, Dark Purple color)   Actual size of 1ct Sapphire (emerald cut, 6.39×4.73mm, Light Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Purple 1ct Alexandrite (round cut, 6.14×6.14mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Green 1ct Sapphire (emerald cut, 6.39×4.73mm) 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
 37% vs 28%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1ct Alexandrite Round (6.14×6.14mm, Dark Purple) and 1ct Sapphire Emerald (6.39×4.73mm, Light 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, 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.


1 Ct Alexandrite (Round) 1 Ct Sapphire (Emerald)
6.14×6.14 mm vs 6.39×4.73 mm
29.61 mm²   28.11 mm²
Face-up size outline for 1ct Alexandrite (6.14×6.14mm, round cut)
Face-up size outline for 1ct Sapphire (6.39×4.73mm, emerald cut)
1ct Alexandrite Round (6.14×6.14mm)
1ct Sapphire Emerald (6.39×4.73mm)
Difference: 5% (1.5 mm²)
1ct Alexandrite (Round, 6.14×6.14mm) has approx. 5% more face-up area than 1ct Sapphire (Emerald, 6.39×4.73mm).


Popular comparisons: