4ct Ruby (Cabochon, 10.86×7.24mm, Red) vs 8.16ct Emerald (Oval, 17.36×11.57mm, Green)
Quick summary: When looked from above (face-up position), 8.16ct Emerald (17.36×11.57mm, oval cut) appears 2.6 times larger than 4ct Ruby (10.86×7.24mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 4ct Ruby (cabochon cut) |
vs
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8.16ct Emerald (oval cut) |
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red |
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| 10.86×7.24 mm | 17.36×11.57 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
4ct Ruby Cabochon (10.86×7.24mm, Red)
and
8.16ct Emerald Oval (17.36×11.57mm, 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.
| 4 Ct Ruby (Cabochon) | 8.16 Ct Emerald (Oval) | |
| 10.86×7.24 mm | vs | 17.36×11.57 mm |
| 64.47 mm² | 164.7 mm² |
| 4ct Ruby Cabochon (10.86×7.24mm) | |
| 8.16ct Emerald Oval (17.36×11.57mm) | |
| Difference: 155% (100.23 mm²) |
8.16ct Emerald (Oval, 17.36×11.57mm) has approx. 155% more face-up area than 4ct Ruby (Cabochon, 10.86×7.24mm). In other words, it's 2.55x larger.
Popular comparisons:
- 4ct Ruby (Cabochon, Red, 10.86 x 7.24) vs. 2.75ct Diamond (Oval, White, 11.37 x 7.58)
- 4ct Ruby (Cabochon, Red, 10.86 x 7.24) vs. 4ct Ruby (Emerald, Red, 10.14 x 7.51)
- 4ct Ruby (Cabochon, Red, 10.86 x 7.24) vs. 1.5ct Ruby (Round, Red, 6.84 x 6.84)
- 3ct Ruby (Cabochon, Red, 9.87 x 6.58) vs. 5ct Ruby (Oval, Red, 12.93 x 8.62)
- 1.3ct Ruby (Cabochon, Red, 7.47 x 4.98) vs. 0.13ct Diamond (Round, White, 3.29 x 3.29)
- 10ct Ruby (Cabochon, Red, 14.75 x 9.83) vs. 10ct Emerald (Cabochon, Dark Yellowish Green, 16.82 x 11.21)
- 5ct Ruby (Cabochon, Red, 11.7 x 7.8) vs. 5ct Diamond (Cabochon, White, 12.21 x 8.14)
- 1ct Ruby (Cabochon, Red, 6.84 x 4.56) vs. 0.65ct Emerald (Cabochon, Green, 6.77 x 4.51)