18ct Diamond (Marquise, 27.22×13.61mm, White) vs 18ct Emerald (Marquise, 28.98×14.49mm, Green)
Quick summary: When looked from above (face-up position), 18ct Emerald (28.98×14.49mm, marquise cut) appears 13% larger than 18ct Diamond (27.22×13.61mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 18ct Diamond (marquise cut) |
vs
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18ct Emerald (marquise cut) |
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white |
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| 27.22×13.61 mm | 28.98×14.49 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
18ct Diamond Marquise (27.22×13.61mm, White)
and
18ct Emerald Marquise (28.98×14.49mm, 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, Diamond will face-up smaller than Emerald for a given
carat weight, because it has higher specific gravity
(3.52 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.
| 18 Ct Diamond (Marquise) | 18 Ct Emerald (Marquise) | |
| 27.22×13.61 mm | vs | 28.98×14.49 mm |
| 263.03 mm² | 298.14 mm² |
| 18ct Diamond Marquise (27.22×13.61mm) | |
| 18ct Emerald Marquise (28.98×14.49mm) | |
| Difference: 13% (35.11 mm²) |
18ct Emerald (Marquise, 28.98×14.49mm) has approx. 13% more face-up area than 18ct Diamond (Marquise, 27.22×13.61mm).
Popular comparisons:
- 0.3ct Diamond (Marquise, White, 7 x 3.5) vs. 0.4ct Diamond (Round, White, 4.79 x 4.79)
- 0.2ct Diamond (Marquise, White, 6.08 x 3.04) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Diamond (Marquise, White, 10.38 x 5.19) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.5ct Diamond (Marquise, White, 8.24 x 4.12) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.3ct Diamond (Marquise, White, 6.96 x 3.48) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 5ct Diamond (Marquise, White, 16.85 x 9.12) vs. 5ct Diamond (Marquise, White, 16.59 x 8.86)
- 1ct Diamond (Marquise, White, 10.38 x 5.19) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 0.05ct Diamond (Marquise, White, 3.82 x 1.91) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Diamond (Marquise, White, 10.38 x 5.19) vs. 1.5ct Diamond (Marquise, White, 11.9 x 5.95)