0.5ct Ruby (Round, 4.75×4.75mm, Dark Red) vs 1ct Diamond (Round, 6.5×6.5mm, White)
Quick summary: When looked from above (face-up position), 1ct Diamond (6.5×6.5mm, round cut) appears 87% larger than 0.5ct Ruby (4.75×4.75mm, round cut). See below how they compare side-by-side on a ring and finger.
| 0.5ct Ruby (round cut) |
vs
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1ct Diamond (round cut) |
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dark red |
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| 4.75×4.75 mm | 6.5×6.5 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
0.5ct Ruby Round (4.75×4.75mm, Dark Red)
and
1ct Diamond Round (6.5×6.5mm, 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.
| 0.5 Ct Ruby (Round) | 1 Ct Diamond (Round) | |
| 4.75×4.75 mm | vs | 6.5×6.5 mm |
| 17.72 mm² | 33.18 mm² |
| 0.5ct Ruby Round (4.75×4.75mm) | |
| 1ct Diamond Round (6.5×6.5mm) | |
| Difference: 87% (15.46 mm²) |
1ct Diamond (Round, 6.5×6.5mm) has approx. 87% more face-up area than 0.5ct Ruby (Round, 4.75×4.75mm).
Popular comparisons:
- 0.5ct Ruby (Round, Dark Red, 4.75 x 4.75) vs. 0.25ct Ruby (Round, Dark Red, 3.77 x 3.77)
- 0.5ct Ruby (Round, Dark Red, 4.75 x 4.75) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 0.5ct Ruby (Round, Dark Red, 4.75 x 4.75) vs. 0.45ct Diamond (Round, White, 4.98 x 4.98)
- 0.5ct Ruby (Round, Dark Red, 4.75 x 4.75) vs. 0.56ct Ruby (Emerald, Red, 5.9 x 4)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Ruby (Round, Red, 8.62 x 8.62) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 0.5ct Ruby (Round, Red, 4.75 x 4.75) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
Use the simulator on this page to play around with different ring and finger configurations.