3.1ct Sapphire (Emerald, 9.1×6.25mm, Blue) vs 3.15ct Diamond (Emerald, 10.99×7.51mm, White)
Quick summary: When looked from above (face-up position), 3.15ct Diamond (10.99×7.51mm, emerald cut) appears 45% larger than 3.1ct Sapphire (9.1×6.25mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 3.1ct Sapphire (emerald cut) |
vs
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3.15ct Diamond (emerald cut) |
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blue |
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| 9.1×6.25 mm | 10.99×7.51 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
3.1ct Sapphire Emerald (9.1×6.25mm, Blue)
and
3.15ct Diamond Emerald (10.99×7.51mm, 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, Sapphire 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.
| 3.1 Ct Sapphire (Emerald) | 3.15 Ct Diamond (Emerald) | |
| 9.1×6.25 mm | vs | 10.99×7.51 mm |
| 52.89 mm² | 76.76 mm² |
| 3.1ct Sapphire Emerald (9.1×6.25mm) | |
| 3.15ct Diamond Emerald (10.99×7.51mm) | |
| Difference: 45% (23.87 mm²) |
3.15ct Diamond (Emerald, 10.99×7.51mm) has approx. 45% more face-up area than 3.1ct Sapphire (Emerald, 9.1×6.25mm).
Popular comparisons:
- 3.1ct Sapphire (Emerald, Blue, 9.1 x 6.25) vs. 2.85ct Sapphire (Cushion, Blue, 8.41 x 6.3)
- 3.1ct Sapphire (Emerald, Blue, 9.1 x 6.25) vs. 3ct Diamond (Emerald, White, 9.64 x 7.14)
- 1ct Sapphire (Emerald, Blue, 7 x 5) vs. 1ct Sapphire (Oval, Blue, 7 x 5)
- 2ct Sapphire (Emerald, Blue, 8.05 x 5.96) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 2ct Sapphire (Emerald, Blue, 8.05 x 5.96) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 3ct Sapphire (Emerald, Blue, 10 x 8) vs. 3ct Sapphire (Round, Blue, 8.62 x 8.62)
- 1ct Sapphire (Emerald, Blue, 6.39 x 4.73) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4.2ct Sapphire (Emerald, Blue, 10.3 x 7.63) vs. 1.5ct Diamond (Round, White, 7.44 x 7.44)