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1.75ct Alexandrite (Princess, 6.48×6.48mm, Bluish Green) vs 1.75ct Diamond (Princess, 6.64×6.64mm, White)


Quick summary: When looked from above (face-up position), 1.75ct Diamond (6.64×6.64mm, princess cut) appears 5% larger than 1.75ct Alexandrite (6.48×6.48mm, princess cut). See below how they compare side-by-side on a ring and finger.

1.75ct Alexandrite (princess cut)
vs
 1.75ct Diamond (princess cut)
bluish green
 
white
6.48×6.48 mm 6.64×6.64 mm
actual size
Actual size of 1.75ct Alexandrite (princess cut, 6.48×6.48mm, Bluish Green color)   Actual size of 1.75ct Diamond (princess cut, 6.64×6.64mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 1.75ct Alexandrite (princess cut, 6.48×6.48mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1.75ct Diamond (princess cut, 6.64×6.64mm) 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
 39% vs 40%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.75ct Alexandrite Princess (6.48×6.48mm, Bluish Green) and 1.75ct Diamond Princess (6.64×6.64mm, White) 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 Diamond for a given carat weight, because it has higher specific gravity (3.73 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


1.75 Ct Alexandrite (Princess) 1.75 Ct Diamond (Princess)
6.48×6.48 mm vs 6.64×6.64 mm
41.99 mm²   44.09 mm²
Face-up size outline for 1.75ct Diamond (6.64×6.64mm, princess cut)
Face-up size outline for 1.75ct Alexandrite (6.48×6.48mm, princess cut)
1.75ct Alexandrite Princess (6.48×6.48mm)
1.75ct Diamond Princess (6.64×6.64mm)
Difference: 5% (2.1 mm²)
1.75ct Diamond (Princess, 6.64×6.64mm) has approx. 5% more face-up area than 1.75ct Alexandrite (Princess, 6.48×6.48mm).


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