7ct Ruby (Oval, 14.48×9.65mm, Red) vs 4ct Diamond (Cushion, 9.25×9.25mm, White)
Quick summary: When looked from above (face-up position), 7ct Ruby (14.48×9.65mm, oval cut) appears 49% larger than 4ct Diamond (9.25×9.25mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 7ct Ruby (oval cut) |
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4ct Diamond (cushion cut) |
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red |
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| 14.48×9.65 mm | 9.25×9.25 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
7ct Ruby Oval (14.48×9.65mm, Red)
and
4ct Diamond Cushion (9.25×9.25mm, 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.
| 7 Ct Ruby (Oval) | 4 Ct Diamond (Cushion) | |
| 14.48×9.65 mm | vs | 9.25×9.25 mm |
| 114.58 mm² | 77.01 mm² |
| 7ct Ruby Oval (14.48×9.65mm) | |
| 4ct Diamond Cushion (9.25×9.25mm) | |
| Difference: 49% (37.57 mm²) |
7ct Ruby (Oval, 14.48×9.65mm) has approx. 49% more face-up area than 4ct Diamond (Cushion, 9.25×9.25mm).
Popular comparisons:
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 7ct Ruby (Marquise, Red, 28.8 x 6)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 5ct Peridot (Oval, Light Yellowish Green, 13.5 x 9.5)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 4ct Diamond (Oval, White, 12.89 x 8.59)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 2.75ct Diamond (Oval, White, 11.37 x 7.58)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 5ct Ruby (Oval, Red, 12.93 x 8.62)
- 7ct Ruby (Oval, Red, 14.48 x 9.65) vs. 6ct Ruby (Oval, Red, 13.74 x 9.16)
- 4ct Ruby (Oval, Red, 11 x 8.15) vs. 2.75ct Diamond (Oval, White, 11.37 x 7.58)
Use the simulator on this page to play around with different ring and finger configurations.