2.5ct Ruby (Marquise, 13.4×6.7mm, Red) vs 2ct Diamond (Round, 8.19×8.19mm, White)
Quick summary: When looked from above (face-up position), 2.5ct Ruby (13.4×6.7mm, marquise cut) appears 21% larger than 2ct Diamond (8.19×8.19mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2.5ct Ruby (marquise cut) |
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2ct Diamond (round cut) |
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red |
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| 13.4×6.7 mm | 8.19×8.19 mm | |
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Actual sizes of
2.5ct Ruby Marquise (13.4×6.7mm, 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 (Marquise) | 2 Ct Diamond (Round) | |
| 13.4×6.7 mm | vs | 8.19×8.19 mm |
| 63.74 mm² | 52.68 mm² |
| 2.5ct Ruby Marquise (13.4×6.7mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 21% (11.06 mm²) |
2.5ct Ruby Marquise (13.4×6.7mm) has approx. 21% more face-up area than 2ct Diamond Round (8.19×8.19mm).
Popular comparisons:
- 2.5ct Ruby (Marquise, Red, 13.4 x 6.7) vs. 5ct Alexandrite (Marquise, Bluish Green, 17.32 x 8.66)
- 0.15ct Ruby (Marquise, Red, 5.24 x 2.62) vs. 0.14ct Diamond (Marquise, White, 5 x 2.5)
- 1ct Ruby (Marquise, Red, 9.88 x 4.94) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.5ct Ruby (Marquise, Red, 7.84 x 3.92) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 1.27ct Ruby (Marquise, Red, 10.68 x 5.34) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 0.17ct Ruby (Marquise, Red, 5.46 x 2.73) vs. 0.14ct Diamond (Marquise, White, 5 x 2.5)
- 3ct Ruby (Marquise, Red, 14.24 x 7.12) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 5ct Ruby (Marquise, Red, 16.88 x 8.44) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.