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33ct Alexandrite (Trillion, 24×24mm, Bluish Green) vs 33ct Topaz (Trillion, 24.44×24.44mm, Blue)


Quick summary: When looked from above (face-up position), 33ct Topaz (24.44×24.44mm, trillion cut) appears 4% larger than 33ct Alexandrite (24×24mm, trillion cut). See below how they compare side-by-side on a ring and finger.

33ct Alexandrite (trillion cut)
vs
 33ct Topaz (trillion cut)
bluish green
 
blue
24×24 mm 24.44×24.44 mm
actual size
Actual size of 33ct Alexandrite (trillion cut, 24×24mm, Bluish Green color)   Actual size of 33ct Topaz (trillion cut, 24.44×24.44mm, 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 33ct Alexandrite (trillion cut, 24×24mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 33ct Topaz (trillion cut, 24.44×24.44mm) 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
 143% vs 145%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 33ct Alexandrite Trillion (24×24mm, Bluish Green) and 33ct Topaz Trillion (24.44×24.44mm, 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, Alexandrite will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (3.73 vs. 3.53 - this means it's "heavier" compared to Topaz 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.


33 Ct Alexandrite (Trillion) 33 Ct Topaz (Trillion)
24×24 mm vs 24.44×24.44 mm
357.12 mm²   370.33 mm²
Face-up size outline for 33ct Topaz (24.44×24.44mm, trillion cut)
Face-up size outline for 33ct Alexandrite (24×24mm, trillion cut)
33ct Alexandrite Trillion (24×24mm)
33ct Topaz Trillion (24.44×24.44mm)
Difference: 4% (13.21 mm²)
33ct Topaz (Trillion, 24.44×24.44mm) has approx. 4% more face-up area than 33ct Alexandrite (Trillion, 24×24mm).


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