3.1ct Diamond (Oval, 11.84×7.89mm, White) vs 3.87ct Sapphire (Oval, 11.88×7.92mm, Blue)
Quick summary: When looked from above (face-up position), 3.87ct Sapphire (11.88×7.92mm, oval cut) appears 0.7% larger than 3.1ct Diamond (11.84×7.89mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 3.1ct Diamond (oval cut) |
vs
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3.87ct Sapphire (oval cut) |
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white |
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| 11.84×7.89 mm | 11.88×7.92 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 Diamond Oval (11.84×7.89mm, White)
and
3.87ct Sapphire Oval (11.88×7.92mm, Blue)
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 Diamond (Oval) | 3.87 Ct Sapphire (Oval) | |
| 11.84×7.89 mm | vs | 11.88×7.92 mm |
| 76.6 mm² | 77.15 mm² |
| 3.1ct Diamond Oval (11.84×7.89mm) | |
| 3.87ct Sapphire Oval (11.88×7.92mm) | |
| Difference: 0.7% (0.55 mm²) |
3.87ct Sapphire (Oval, 11.88×7.92mm) has approx. 0.7% more face-up area than 3.1ct Diamond (Oval, 11.84×7.89mm).
Popular comparisons:
- 3.1ct Diamond (Oval, White, 11.84 x 7.89) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3.1ct Diamond (Oval, White, 11.84 x 7.89) vs. 1ct Diamond (Round, White, 6.48 x 5.76)
- 3.1ct Diamond (Oval, White, 11.84 x 7.89) vs. 0.53ct Diamond (Round, White, 5.26 x 5.26)
- 3.1ct Diamond (Oval, White, 11.84 x 7.89) vs. 2.4ct Diamond (Oval, White, 10.86 x 7.24)
- 3.1ct Diamond (Oval, White, 11.84 x 7.89) vs. 2.5ct Diamond (Oval, White, 10 x 7)
- 1ct Diamond (Oval, White, 8 x 6) vs. 1ct Sapphire (Oval, Blue, 7 x 5)
- 2ct Diamond (Oval, White, 10 x 7) vs. 1.8ct Diamond (Oval, White, 9 x 7)
- 2.5ct Diamond (Oval, White, 10 x 7) vs. 1ct Diamond (Oval, White, 9 x 6)