1ct Diamond (Princess, 5.51×5.51mm, White) vs 3ct Ruby (Pear, 11.99×7.22mm, Red)
Quick summary: When looked from above (face-up position), 3ct Ruby (11.99×7.22mm, pear cut) appears 2.1 times larger than 1ct Diamond (5.51×5.51mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 1ct Diamond (princess cut) |
vs
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3ct Ruby (pear cut) |
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white |
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| 5.51×5.51 mm | 11.99×7.22 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 Diamond Princess (5.51×5.51mm, White)
and
3ct Ruby Pear (11.99×7.22mm, Red)
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 Diamond (Princess) | 3 Ct Ruby (Pear) | |
| 5.51×5.51 mm | vs | 11.99×7.22 mm |
| 30.36 mm² | 63.19 mm² |
| 1ct Diamond Princess (5.51×5.51mm) | |
| 3ct Ruby Pear (11.99×7.22mm) | |
| Difference: 108% (32.83 mm²) |
3ct Ruby (Pear, 11.99×7.22mm) has approx. 108% more face-up area than 1ct Diamond (Princess, 5.51×5.51mm). In other words, it's 2.08x larger.
Popular comparisons:
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1.5ct Diamond (Princess, White, 6.31 x 6.31)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 2ct Diamond (Princess, White, 6.94 x 6.94)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1.25ct Diamond (Princess, White, 5.94 x 5.94)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 0.5ct Diamond (Princess, White, 4.37 x 4.37)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1.1ct Alexandrite (Cushion, Bluish Green, 6.22 x 5.52)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1ct Diamond (Marquise, White, 10.38 x 5.19)