20ct Diamond (Round, 17.64×17.64mm, White) vs 20ct Emerald (Round, 18.45×18.45mm, Green)
Quick summary: When looked from above (face-up position), 20ct Emerald (18.45×18.45mm, round cut) appears 9% larger than 20ct Diamond (17.64×17.64mm, round cut). See below how they compare side-by-side on a ring and finger.
| 20ct Diamond (round cut) |
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20ct Emerald (round cut) |
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white |
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| 17.64×17.64 mm | 18.45×18.45 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
20ct Diamond Round (17.64×17.64mm, White)
and
20ct Emerald Round (18.45×18.45mm, 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.
| 20 Ct Diamond (Round) | 20 Ct Emerald (Round) | |
| 17.64×17.64 mm | vs | 18.45×18.45 mm |
| 244.39 mm² | 267.35 mm² |
| 20ct Diamond Round (17.64×17.64mm) | |
| 20ct Emerald Round (18.45×18.45mm) | |
| Difference: 9% (22.96 mm²) |
20ct Emerald (Round, 18.45×18.45mm) has approx. 9% more face-up area than 20ct Diamond (Round, 17.64×17.64mm).
Popular comparisons:
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 20ct Emerald (Round, Green, 18.5 x 18.5)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 40ct Ruby (Round, Red, 20.45 x 20.45)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 15ct Diamond (Emerald, White, 16.48 x 12.21)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 20ct Sapphire (Round, Blue, 16.23 x 16.23)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 5ct Sapphire (Round, Blue, 10.22 x 10.22)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 35ct Sapphire (Round, Blue, 19.56 x 19.56)