1ct Ruby (Princess, 5.37×5.37mm, 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 83% larger than 1ct Ruby (5.37×5.37mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 1ct Ruby (princess cut) |
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2ct Diamond (round cut) |
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red |
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| 5.37×5.37 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
1ct Ruby Princess (5.37×5.37mm, 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.
| 1 Ct Ruby (Princess) | 2 Ct Diamond (Round) | |
| 5.37×5.37 mm | vs | 8.19×8.19 mm |
| 28.84 mm² | 52.68 mm² |
| 1ct Ruby Princess (5.37×5.37mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 83% (23.84 mm²) |
2ct Diamond (Round, 8.19×8.19mm) has approx. 83% more face-up area than 1ct Ruby (Princess, 5.37×5.37mm).
Popular comparisons:
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 1ct Emerald (Princess, Green, 6.13 x 6.13)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 1.25ct Diamond (Princess, White, 5.94 x 5.94)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 0.75ct Diamond (Cushion, Yellow, 5.29 x 5.29)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 0.75ct Sapphire (Round, Blue, 5.43 x 5.43)
- 1ct Ruby (Princess, Red, 5.37 x 5.37) vs. 0.75ct Sapphire (Baguette, Blue, 6.3 x 4.2)