30ct Ruby (Round, 18.58×18.58mm, Red) vs 1ct Emerald (Emerald, 7.28×5.39mm, Green)
Quick summary: When looked from above (face-up position), 30ct Ruby (18.58×18.58mm, round cut) appears 7.4 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 Ruby (round cut) |
vs
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1ct Emerald (emerald cut) |
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red |
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| 18.58×18.58 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 Ruby Round (18.58×18.58mm, Red)
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, Ruby will face-up smaller than Emerald for a given
carat weight, because it has higher specific gravity
(4 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 Ruby (Round) | 1 Ct Emerald (Emerald) | |
| 18.58×18.58 mm | vs | 7.28×5.39 mm |
| 271.13 mm² | 36.49 mm² |
| 30ct Ruby Round (18.58×18.58mm) | |
| 1ct Emerald Emerald (7.28×5.39mm) | |
| Difference: 643% (234.64 mm²) |
30ct Ruby (Round, 18.58×18.58mm) has approx. 643% more face-up area than 1ct Emerald (Emerald, 7.28×5.39mm). In other words, it's 7.43x larger.
Popular comparisons:
- 30ct Ruby (Round, Red, 18.58 x 18.58) vs. 30ct Diamond (Round, Red, 20.2 x 20.2)
- 30ct Ruby (Round, Red, 18.58 x 18.58) vs. 30ct Fluorite (Round, Bluish Green, 20.05 x 20.05)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Ruby (Round, Red, 8.62 x 8.62) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 0.5ct Ruby (Round, Red, 4.75 x 4.75) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1.5ct Ruby (Round, Red, 6.84 x 6.84)