2.5ct Ruby (Cushion, 7.59×7.59mm, Red) vs 1.8ct Peridot (Cushion, 7.22×7.22mm, Yellowish Green)
Quick summary: When looked from above (face-up position), 2.5ct Ruby (7.59×7.59mm, cushion cut) appears 11% larger than 1.8ct Peridot (7.22×7.22mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 2.5ct Ruby (cushion cut) |
vs
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1.8ct Peridot (cushion cut) |
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red |
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| 7.59×7.59 mm | 7.22×7.22 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
2.5ct Ruby Cushion (7.59×7.59mm, Red)
and
1.8ct Peridot Cushion (7.22×7.22mm, Yellowish Green)
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 Peridot for a given
carat weight, because it has higher specific gravity
(4 vs. 3.34 - this means it's "heavier" compared to Peridot 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.
| 2.5 Ct Ruby (Cushion) | 1.8 Ct Peridot (Cushion) | |
| 7.59×7.59 mm | vs | 7.22×7.22 mm |
| 51.85 mm² | 46.92 mm² |
| 2.5ct Ruby Cushion (7.59×7.59mm) | |
| 1.8ct Peridot Cushion (7.22×7.22mm) | |
| Difference: 11% (4.93 mm²) |
2.5ct Ruby (Cushion, 7.59×7.59mm) has approx. 11% more face-up area than 1.8ct Peridot (Cushion, 7.22×7.22mm).
Popular comparisons:
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 2ct Diamond (Cushion, White, 7.34 x 7.34)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 1.7ct Ruby (Cushion, Red, 6.67 x 6.67)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 9ct Peridot (Cushion, Yellowish Green, 12.34 x 12.34)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 2.5ct Diamond (Emerald, White, 9.07 x 6.72)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 3ct Ruby (Cushion, Red, 8.06 x 8.06)
- 2.5ct Ruby (Cushion, Red, 7.59 x 7.59) vs. 2.5ct Sapphire (Cushion, Blue, 7.59 x 7.59)