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9.5ct Alexandrite (Trillion, 15.85×15.85mm, Bluish Green) vs 9.5ct Sapphire (Trillion, 15.48×15.48mm, Blue)


Quick summary: When looked from above (face-up position), 9.5ct Alexandrite (15.85×15.85mm, trillion cut) appears 5% larger than 9.5ct Sapphire (15.48×15.48mm, trillion cut). See below how they compare side-by-side on a ring and finger.

9.5ct Alexandrite (trillion cut)
vs
 9.5ct Sapphire (trillion cut)
bluish green
 
blue
15.85×15.85 mm 15.48×15.48 mm
actual size
Actual size of 9.5ct Alexandrite (trillion cut, 15.85×15.85mm, Bluish Green color)   Actual size of 9.5ct Sapphire (trillion cut, 15.48×15.48mm, 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 9.5ct Alexandrite (trillion cut, 15.85×15.85mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 9.5ct Sapphire (trillion cut, 15.48×15.48mm) 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
 94% vs 92%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 9.5ct Alexandrite Trillion (15.85×15.85mm, Bluish Green) and 9.5ct Sapphire Trillion (15.48×15.48mm, 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.


9.5 Ct Alexandrite (Trillion) 9.5 Ct Sapphire (Trillion)
15.85×15.85 mm vs 15.48×15.48 mm
155.76 mm²   148.57 mm²
Face-up size outline for 9.5ct Alexandrite (15.85×15.85mm, trillion cut)
Face-up size outline for 9.5ct Sapphire (15.48×15.48mm, trillion cut)
9.5ct Alexandrite Trillion (15.85×15.85mm)
9.5ct Sapphire Trillion (15.48×15.48mm)
Difference: 5% (7.19 mm²)
9.5ct Alexandrite (Trillion, 15.85×15.85mm) has approx. 5% more face-up area than 9.5ct Sapphire (Trillion, 15.48×15.48mm).


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