2.5ct Ruby (Emerald, 8.67×6.42mm, Red) vs 2ct Diamond (Round, 8.19×8.19mm, White)
Quick summary: When looked from above (face-up position), 2ct Diamond (8.19×8.19mm, round cut) appears 2% larger than 2.5ct Ruby (8.67×6.42mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 2.5ct Ruby (emerald cut) |
vs
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2ct Diamond (round cut) |
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red |
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| 8.67×6.42 mm | 8.19×8.19 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
2.5ct Ruby Emerald (8.67×6.42mm, Red)
and
2ct Diamond Round (8.19×8.19mm, White)
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 Diamond for a given
carat weight, because it has higher specific gravity
(4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.
| 2.5 Ct Ruby (Emerald) | 2 Ct Diamond (Round) | |
| 8.67×6.42 mm | vs | 8.19×8.19 mm |
| 51.77 mm² | 52.68 mm² |
| 2.5ct Ruby Emerald (8.67×6.42mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 2% (0.91 mm²) |
2ct Diamond (Round, 8.19×8.19mm) has approx. 2% more face-up area than 2.5ct Ruby (Emerald, 8.67×6.42mm).
Popular comparisons:
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2.5ct Diamond (Emerald, White, 9.07 x 6.72)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2.75ct Ruby (Emerald, Red, 8.95 x 6.63)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2.5ct Emerald (Emerald, Green, 9.88 x 7.32)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2ct Ruby (Cushion, Red, 7.04 x 7.04)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2ct Diamond (Cushion, White, 7.34 x 7.34)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2.75ct Ruby (Oval, Red, 10.59 x 7.06)
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 3.5ct Ruby (Emerald, Red, 9.69 x 7.18)