4ct Ruby (Pear, 13.18×7.94mm, Red) vs 2.75ct Diamond (Pear, 12.68×7.64mm, White)
Quick summary: When looked from above (face-up position), 4ct Ruby (13.18×7.94mm, pear cut) appears 8% larger than 2.75ct Diamond (12.68×7.64mm, pear cut). See below how they compare side-by-side on a ring and finger.
| 4ct Ruby (pear cut) |
vs
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2.75ct Diamond (pear cut) |
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red |
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| 13.18×7.94 mm | 12.68×7.64 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 Pear (13.18×7.94mm, Red)
and
2.75ct Diamond Pear (12.68×7.64mm, 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.
| 4 Ct Ruby (Pear) | 2.75 Ct Diamond (Pear) | |
| 13.18×7.94 mm | vs | 12.68×7.64 mm |
| 76.39 mm² | 70.72 mm² |
| 4ct Ruby Pear (13.18×7.94mm) | |
| 2.75ct Diamond Pear (12.68×7.64mm) | |
| Difference: 8% (5.67 mm²) |
4ct Ruby (Pear, 13.18×7.94mm) has approx. 8% more face-up area than 2.75ct Diamond (Pear, 12.68×7.64mm).
Popular comparisons:
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 5ct Ruby (Pear, Red, 14.21 x 8.56)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 2.75ct Diamond (Oval, White, 11.37 x 7.58)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 4.5ct Ruby (Cushion, Red, 9.57 x 8.64)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 1.2ct Ruby (Pear, Red, 8.83 x 5.32)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 1.1ct Ruby (Pear, Red, 8.57 x 5.16)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 3.5ct Ruby (Emerald, Red, 9.69 x 7.18)
- 4ct Ruby (Pear, Red, 13.18 x 7.94) vs. 4ct Diamond (Emerald, White, 10.61 x 7.86)