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24ct Diaspore (Cushion, 16.86×16.86mm, Light Yellowish Green) vs 24ct Alexandrite (Cushion, 16.34×16.34mm, Bluish Green)


Quick summary: When looked from above (face-up position), 24ct Diaspore (16.86×16.86mm, cushion cut) appears 6% larger than 24ct Alexandrite (16.34×16.34mm, cushion cut). See below how they compare side-by-side on a ring and finger.

24ct Diaspore (cushion cut)
vs
 24ct Alexandrite (cushion cut)
light yellowish green
 
bluish green
16.86×16.86 mm 16.34×16.34 mm
actual size
Actual size of 24ct Diaspore (cushion cut, 16.86×16.86mm, Light Yellowish Green color)   Actual size of 24ct Alexandrite (cushion cut, 16.34×16.34mm, 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 24ct Diaspore (cushion cut, 16.86×16.86mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 24ct Alexandrite (cushion cut, 16.34×16.34mm) 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
 100% vs 97%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 24ct Diaspore Cushion (16.86×16.86mm, Light Yellowish Green) and 24ct Alexandrite Cushion (16.34×16.34mm, 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.


24 Ct Diaspore (Cushion) 24 Ct Alexandrite (Cushion)
16.86×16.86 mm vs 16.34×16.34 mm
255.83 mm²   240.3 mm²
Face-up size outline for 24ct Diaspore (16.86×16.86mm, cushion cut)
Face-up size outline for 24ct Alexandrite (16.34×16.34mm, cushion cut)
24ct Diaspore Cushion (16.86×16.86mm)
24ct Alexandrite Cushion (16.34×16.34mm)
Difference: 6% (15.53 mm²)
24ct Diaspore (Cushion, 16.86×16.86mm) has approx. 6% more face-up area than 24ct Alexandrite (Cushion, 16.34×16.34mm).


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