40ct Alexandrite (Trillion, 24.67×24.67mm, Bluish Green) vs 40ct Emerald (Marquise, 38.48×19.24mm, Green)
Quick summary: When looked from above (face-up position), 40ct Emerald (38.48×19.24mm, marquise cut) appears 39% larger than 40ct Alexandrite (24.67×24.67mm, trillion cut). See below how they compare side-by-side on a ring and finger.
| 40ct Alexandrite (trillion cut) |
vs
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40ct Emerald (marquise cut) |
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bluish green |
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| 24.67×24.67 mm | 38.48×19.24 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
40ct Alexandrite Trillion (24.67×24.67mm, Bluish Green)
and
40ct Emerald Marquise (38.48×19.24mm, 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 Emerald for a given
carat weight, because it has higher specific gravity
(3.73 vs. 2.72 - this means it's "heavier" compared to Emerald 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.
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.
| 40 Ct Alexandrite (Trillion) | 40 Ct Emerald (Marquise) | |
| 24.67×24.67 mm | vs | 38.48×19.24 mm |
| 377.34 mm² | 525.65 mm² |
| 40ct Alexandrite Trillion (24.67×24.67mm) | |
| 40ct Emerald Marquise (38.48×19.24mm) | |
| Difference: 39% (148.31 mm²) |
40ct Emerald (Marquise, 38.48×19.24mm) has approx. 39% more face-up area than 40ct Alexandrite (Trillion, 24.67×24.67mm).
Popular comparisons:
- 40ct Alexandrite (Trillion, Bluish Green, 24.67 x 24.67) vs. 40ct Emerald (Pear, Green, 32.39 x 19.51)
- 0.75ct Alexandrite (Trillion, Bluish Green, 6.55 x 6.55) vs. 0.87ct Diamond (Round, White, 6.21 x 6.21)
- 1ct Alexandrite (Trillion, Bluish Green, 7.21 x 7.21) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.8ct Alexandrite (Trillion, Dark Purple, 8.77 x 8.77) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 5.5ct Alexandrite (Trillion, Bluish Green, 12.73 x 12.73) vs. 8.5ct Alexandrite (Oval, Bluish Green, 15.84 x 10.56)
- 1ct Alexandrite (Trillion, Bluish Green, 8 x 8) vs. 1ct Alexandrite (Pear, Bluish Green, 9 x 6)
- 1ct Alexandrite (Trillion, Green, 6.4 x 6.5) vs. 1.75ct Emerald (Emerald, Green, 8.78 x 6.5)
- 12ct Alexandrite (Trillion, Bluish Green, 16.52 x 16.52) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)