1ct Alexandrite (Marquise, 9.3×4.6mm, Dark Bluish Green) vs 1ct Diamond (Marquise, 10.38×5.19mm, White)
Quick summary: When looked from above (face-up position), 1ct Diamond (10.38×5.19mm, marquise cut) appears 26% larger than 1ct Alexandrite (9.3×4.6mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 1ct Alexandrite (marquise cut) |
vs
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1ct Diamond (marquise cut) |
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dark bluish green |
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| 9.3×4.6 mm | 10.38×5.19 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
1ct Alexandrite Marquise (9.3×4.6mm, Dark Bluish Green)
and
1ct Diamond Marquise (10.38×5.19mm, 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.
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 Ct Alexandrite (Marquise) | 1 Ct Diamond (Marquise) | |
| 9.3×4.6 mm | vs | 10.38×5.19 mm |
| 30.37 mm² | 38.25 mm² |
| 1ct Alexandrite Marquise (9.3×4.6mm) | |
| 1ct Diamond Marquise (10.38×5.19mm) | |
| Difference: 26% (7.88 mm²) |
1ct Diamond (Marquise, 10.38×5.19mm) has approx. 26% more face-up area than 1ct Alexandrite (Marquise, 9.3×4.6mm).
Popular comparisons:
- 1ct Alexandrite (Marquise, Dark Bluish Green, 9.3 x 4.6) vs. 1ct Emerald (Marquise, Dark Green, 11.26 x 5.63)
- 1ct Alexandrite (Marquise, Bluish Green, 10 x 5) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Alexandrite (Marquise, Bluish Green, 10.12 x 5.06) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 7ct Alexandrite (Marquise, Bluish Green, 19.38 x 9.69) vs. 2ct Alexandrite (Marquise, Bluish Green, 12.76 x 6.38)
- 1.5ct Alexandrite (Marquise, Bluish Green, 11.6 x 5.8) vs. 2ct Alexandrite (Marquise, Bluish Green, 12.76 x 6.38)
- 1ct Alexandrite (Marquise, Bluish Green, 10 x 5) vs. 1ct Alexandrite (Oval, Bluish Green, 8 x 6)
- 0.24ct Alexandrite (Marquise, Bluish Green, 6.23 x 2.78) vs. 0.68ct Alexandrite (Oval, Bluish Green, 6.7 x 4.2)
- 1ct Alexandrite (Marquise, Bluish Green, 10 x 5) vs. 1ct Diamond (Marquise, White, 10.38 x 5.19)