×
carat vs. color  length*  width*
  ×

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

19ct Diaspore (Cushion, 15.59×15.59mm, Light Yellowish Green) vs 19ct Alexandrite (Cushion, 15.12×15.12mm, Bluish Green)


Quick summary: When looked from above (face-up position), 19ct Diaspore (15.59×15.59mm, cushion cut) appears 6% larger than 19ct Alexandrite (15.12×15.12mm, cushion cut). See below how they compare side-by-side on a ring and finger.

19ct Diaspore (cushion cut)
vs
 19ct Alexandrite (cushion cut)
light yellowish green
 
bluish green
15.59×15.59 mm 15.12×15.12 mm
actual size
Actual size of 19ct Diaspore (cushion cut, 15.59×15.59mm, Light Yellowish Green color)   Actual size of 19ct Alexandrite (cushion cut, 15.12×15.12mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Yellowish Green 19ct Diaspore (cushion cut, 15.59×15.59mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 19ct Alexandrite (cushion cut, 15.12×15.12mm) 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
 93% vs 90%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 19ct Diaspore Cushion (15.59×15.59mm, Light Yellowish Green) and 19ct Alexandrite Cushion (15.12×15.12mm, 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 smaller than Diaspore for a given carat weight, because it has higher specific gravity (3.73 vs. 3.4 - this means it's "heavier" compared to Diaspore 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.


19 Ct Diaspore (Cushion) 19 Ct Alexandrite (Cushion)
15.59×15.59 mm vs 15.12×15.12 mm
218.74 mm²   205.75 mm²
Face-up size outline for 19ct Diaspore (15.59×15.59mm, cushion cut)
Face-up size outline for 19ct Alexandrite (15.12×15.12mm, cushion cut)
19ct Diaspore Cushion (15.59×15.59mm)
19ct Alexandrite Cushion (15.12×15.12mm)
Difference: 6% (12.99 mm²)
19ct Diaspore (Cushion, 15.59×15.59mm) has approx. 6% more face-up area than 19ct Alexandrite (Cushion, 15.12×15.12mm).


Popular comparisons: