1.75ct Ruby (Emerald, 7.7×5.7mm, Red) vs 1.75ct Spinel (Emerald, 7.97×5.9mm, Red)
Quick summary: When looked from above (face-up position), 1.75ct Spinel (7.97×5.9mm, emerald cut) appears 7% larger than 1.75ct Ruby (7.7×5.7mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 1.75ct Ruby (emerald cut) |
vs
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1.75ct Spinel (emerald cut) |
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red |
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| 7.7×5.7 mm | 7.97×5.9 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
1.75ct Ruby Emerald (7.7×5.7mm, Red)
and
1.75ct Spinel Emerald (7.97×5.9mm, Red)
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 Spinel for a given
carat weight, because it has higher specific gravity
(4 vs. 3.6 - this means it's "heavier" compared to Spinel 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.
| 1.75 Ct Ruby (Emerald) | 1.75 Ct Spinel (Emerald) | |
| 7.7×5.7 mm | vs | 7.97×5.9 mm |
| 40.82 mm² | 43.73 mm² |
| 1.75ct Ruby Emerald (7.7×5.7mm) | |
| 1.75ct Spinel Emerald (7.97×5.9mm) | |
| Difference: 7% (2.91 mm²) |
1.75ct Spinel (Emerald, 7.97×5.9mm) has approx. 7% more face-up area than 1.75ct Ruby (Emerald, 7.7×5.7mm).
Popular comparisons:
- 2.5ct Ruby (Emerald, Red, 8.67 x 6.42) vs. 2.5ct Diamond (Emerald, White, 9.07 x 6.72)
- 3ct Ruby (Emerald, Red, 9.21 x 6.82) vs. 2ct Ruby (Round, Red, 7.53 x 7.53)
- 1ct Ruby (Emerald, Red, 6.39 x 4.73) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 5ct Ruby (Emerald, Red, 10.92 x 8.09) vs. 5ct Ruby (Oval, Red, 12.93 x 8.62)
- 0.47ct Ruby (Emerald, Red, 4.97 x 3.68) vs. 0.6ct Emerald (Emerald, Green, 6.14 x 4.55)
- 1ct Ruby (Emerald, Red, 6.39 x 4.73) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Ruby (Emerald, Red, 9.21 x 6.82) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 5ct Ruby (Emerald, Red, 10.92 x 8.09) vs. 5ct Emerald (Emerald, Green, 12.45 x 9.22)
- 8ct Ruby (Emerald, Red, 12.77 x 9.46) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)