15ct Sapphire (Oval, 18×13mm, Blue) vs 12ct Sapphire (Oval, 17.31×11.54mm, Blue)
Quick summary: When looked from above (face-up position), 15ct Sapphire (18×13mm, oval cut) appears 17% larger than 12ct Sapphire (17.31×11.54mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 15ct Sapphire (oval cut) |
vs
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12ct Sapphire (oval cut) |
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blue |
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| 18×13 mm | 17.31×11.54 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
15ct Sapphire Oval (18×13mm, Blue)
and
12ct Sapphire Oval (17.31×11.54mm, 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
The face-up size depends on the shape of the gem, its weight and 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.
| 15 Ct Sapphire (Oval) | 12 Ct Sapphire (Oval) | |
| 18×13 mm | vs | 17.31×11.54 mm |
| 191.88 mm² | 163.8 mm² |
| 15ct Sapphire Oval (18×13mm) | |
| 12ct Sapphire Oval (17.31×11.54mm) | |
| Difference: 17% (28.08 mm²) |
15ct Sapphire (Oval, 18×13mm) has approx. 17% more face-up area than 12ct Sapphire (Oval, 17.31×11.54mm).
Popular comparisons:
- 15ct Sapphire (Oval, Blue, 18 x 13) vs. 13ct Sapphire (Oval, Blue, 16 x 12)
- 15ct Sapphire (Oval, Blue, 18 x 13) vs. 12ct Sapphire (Oval, Blue, 14.85 x 11.78)
- 2ct Sapphire (Oval, Blue, 9.53 x 6.35) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 1.5ct Sapphire (Oval, Blue, 8.66 x 5.77) vs. 1.52ct Diamond (Oval, White, 9.33 x 6.22)
- 5ct Sapphire (Oval, Blue, 12.93 x 8.62) vs. 5ct Diamond (Oval, White, 13.88 x 9.25)
- 2.5ct Sapphire (Oval, White, 9 x 7) vs. 2.5ct Diamond (Oval, White, 9 x 7)
- 3ct Sapphire (Oval, Blue, 10.91 x 7.27) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 1.52ct Sapphire (Oval, Blue, 8.7 x 5.8) vs. 0.92ct Diamond (Round, White, 6.32 x 6.32)