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1.5ct Peridot (Trillion, 8.54×8.54mm, Yellowish Green) vs 1.1ct Alexandrite (Trillion, 7.45×7.45mm, Bluish Green)


Quick summary: When looked from above (face-up position), 1.5ct Peridot (8.54×8.54mm, trillion cut) appears 31% larger than 1.1ct Alexandrite (7.45×7.45mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1.5ct Peridot (trillion cut)
vs
 1.1ct Alexandrite (trillion cut)
yellowish green
 
bluish green
8.54×8.54 mm 7.45×7.45 mm
actual size
Actual size of 1.5ct Peridot (trillion cut, 8.54×8.54mm, Yellowish Green color)   Actual size of 1.1ct Alexandrite (trillion cut, 7.45×7.45mm, Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Yellowish Green 1.5ct Peridot (trillion cut, 8.54×8.54mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 1.1ct Alexandrite (trillion cut, 7.45×7.45mm) 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
 51% vs 45%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Peridot Trillion (8.54×8.54mm, Yellowish Green) and 1.1ct Alexandrite Trillion (7.45×7.45mm, 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 Peridot for a given carat weight, because it has higher specific gravity (3.73 vs. 3.34 - this means it's "heavier" compared to Peridot 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.


1.5 Ct Peridot (Trillion) 1.1 Ct Alexandrite (Trillion)
8.54×8.54 mm vs 7.45×7.45 mm
45.22 mm²   34.41 mm²
Face-up size outline for 1.5ct Peridot (8.54×8.54mm, trillion cut)
Face-up size outline for 1.1ct Alexandrite (7.45×7.45mm, trillion cut)
1.5ct Peridot Trillion (8.54×8.54mm)
1.1ct Alexandrite Trillion (7.45×7.45mm)
Difference: 31% (10.81 mm²)
1.5ct Peridot (Trillion, 8.54×8.54mm) has approx. 31% more face-up area than 1.1ct Alexandrite (Trillion, 7.45×7.45mm).


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