0.25ct Ruby (Round, 3.77×3.77mm, Red) vs 0.25ct Diamond (Round, 4.09×4.09mm, White)
Quick summary: When looked from above (face-up position), 0.25ct Diamond (4.09×4.09mm, round cut) appears 18% larger than 0.25ct Ruby (3.77×3.77mm, round cut). See below how they compare side-by-side on a ring and finger.
| 0.25ct Ruby (round cut) |
vs
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0.25ct Diamond (round cut) |
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red |
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| 3.77×3.77 mm | 4.09×4.09 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
0.25ct Ruby Round (3.77×3.77mm, Red)
and
0.25ct Diamond Round (4.09×4.09mm, 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.
| 0.25 Ct Ruby (Round) | 0.25 Ct Diamond (Round) | |
| 3.77×3.77 mm | vs | 4.09×4.09 mm |
| 11.16 mm² | 13.14 mm² |
| 0.25ct Ruby Round (3.77×3.77mm) | |
| 0.25ct Diamond Round (4.09×4.09mm) | |
| Difference: 18% (1.98 mm²) |
0.25ct Diamond (Round, 4.09×4.09mm) has approx. 18% more face-up area than 0.25ct Ruby (Round, 3.77×3.77mm).
Popular comparisons:
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.28ct Diamond (Round, White, 4.25 x 4.25)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.16ct Ruby (Round, Red, 3.25 x 3.25)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.25ct Emerald (Round, Green, 4.29 x 4.29)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.7ct Sapphire (Princess, Blue, 4.77 x 4.77)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.19ct Diamond (Round, White, 3.74 x 3.74)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.3ct Diamond (Round, White, 4.35 x 4.35)
- 0.25ct Ruby (Round, Red, 3.77 x 3.77) vs. 0.22ct Diamond (Round, White, 3.92 x 3.92)