1.75ct Ruby (Round, 7.2×7.2mm, Red) vs 1.75ct Spinel (Round, 7.46×7.46mm, Red)
Quick summary: When looked from above (face-up position), 1.75ct Spinel (7.46×7.46mm, round cut) appears 7% larger than 1.75ct Ruby (7.2×7.2mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1.75ct Ruby (round cut) |
vs
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1.75ct Spinel (round cut) |
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red |
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| 7.2×7.2 mm | 7.46×7.46 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 Round (7.2×7.2mm, Red)
and
1.75ct Spinel Round (7.46×7.46mm, 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 (Round) | 1.75 Ct Spinel (Round) | |
| 7.2×7.2 mm | vs | 7.46×7.46 mm |
| 40.72 mm² | 43.71 mm² |
| 1.75ct Ruby Round (7.2×7.2mm) | |
| 1.75ct Spinel Round (7.46×7.46mm) | |
| Difference: 7% (2.99 mm²) |
1.75ct Spinel (Round, 7.46×7.46mm) has approx. 7% more face-up area than 1.75ct Ruby (Round, 7.2×7.2mm).
Popular comparisons:
- 1.75ct Ruby (Round, Red, 7.2 x 7.2) vs. 0.25ct Diamond (Round, White, 4.09 x 4.09)
- 1.75ct Ruby (Round, Red, 7.2 x 7.2) vs. 1.7ct Ruby (Cushion, Red, 6.67 x 6.67)
- 1.75ct Ruby (Round, Red, 7.2 x 7.2) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1.75ct Ruby (Round, Red, 7.2 x 7.2) vs. 0.46ct Diamond (Round, White, 5.02 x 5.02)
- 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)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)