30ct Diamond (Round, 20.2×20.2mm, White) vs 1ct Emerald (Emerald, 7.28×5.39mm, Green)
Quick summary: When looked from above (face-up position), 30ct Diamond (20.2×20.2mm, round cut) appears 8.8 times larger than 1ct Emerald (7.28×5.39mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 30ct Diamond (round cut) |
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1ct Emerald (emerald cut) |
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white |
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| 20.2×20.2 mm | 7.28×5.39 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
30ct Diamond Round (20.2×20.2mm, White)
and
1ct Emerald Emerald (7.28×5.39mm, 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.
| 30 Ct Diamond (Round) | 1 Ct Emerald (Emerald) | |
| 20.2×20.2 mm | vs | 7.28×5.39 mm |
| 320.47 mm² | 36.49 mm² |
| 30ct Diamond Round (20.2×20.2mm) | |
| 1ct Emerald Emerald (7.28×5.39mm) | |
| Difference: 778% (283.98 mm²) |
30ct Diamond (Round, 20.2×20.2mm) has approx. 778% more face-up area than 1ct Emerald (Emerald, 7.28×5.39mm). In other words, it's 8.78x larger.
Popular comparisons:
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 20ct Diamond (Round, White, 17.64 x 17.64)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 40ct Diamond (Round, White, 22.23 x 22.23)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 16ct Diamond (Oval, White, 20.45 x 13.63)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 8ct Diamond (Round, White, 13 x 13)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 30ct Diamond (Emerald, White, 20.76 x 15.38)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 15ct Diamond (Oval, White, 20.01 x 13.34)
- 30ct Diamond (Round, White, 20.2 x 20.2) vs. 0.1ct Diamond (Round, White, 3.02 x 3.02)