18ct Diamond (Round, 17.03×17.03mm, White) vs 1ct Emerald (Round, 6.82×6.82mm, Green)
Quick summary: When looked from above (face-up position), 18ct Diamond (17.03×17.03mm, round cut) appears 6.2 times larger than 1ct Emerald (6.82×6.82mm, round cut). See below how they compare side-by-side on a ring and finger.
| 18ct Diamond (round cut) |
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1ct Emerald (round cut) |
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white |
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| 17.03×17.03 mm | 6.82×6.82 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 Round (17.03×17.03mm, White)
and
1ct Emerald Round (6.82×6.82mm, 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 (Round) | 1 Ct Emerald (Round) | |
| 17.03×17.03 mm | vs | 6.82×6.82 mm |
| 227.78 mm² | 36.53 mm² |
| 18ct Diamond Round (17.03×17.03mm) | |
| 1ct Emerald Round (6.82×6.82mm) | |
| Difference: 524% (191.25 mm²) |
18ct Diamond (Round, 17.03×17.03mm) has approx. 524% more face-up area than 1ct Emerald (Round, 6.82×6.82mm). In other words, it's 6.24x larger.
Popular comparisons:
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 0.16ct Diamond (Round, White, 3.53 x 3.53)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 4ct Diamond (Oval, White, 12.89 x 8.59)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 22ct Diamond (Round, White, 18.21 x 18.21)
- 0.1ct Diamond (Round, White, 3.02 x 3.02) vs. 0.15ct Diamond (Round, White, 3.45 x 3.45)
- 1.5ct Diamond (Round, White, 7.5 x 7.5) vs. 2ct Diamond (Round, White, 8 x 8)
- 20ct Diamond (Round, White, 17.64 x 17.64) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)