7ct Sapphire (Oval, 14.67×9.78mm, Blue) vs 7ct Topaz (Oval, 15.29×10.19mm, Blue)
Quick summary: When looked from above (face-up position), 7ct Topaz (15.29×10.19mm, oval cut) appears 9% larger than 7ct Sapphire (14.67×9.78mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 7ct Sapphire (oval cut) |
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7ct Topaz (oval cut) |
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blue |
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| 14.67×9.78 mm | 15.29×10.19 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
7ct Sapphire Oval (14.67×9.78mm, Blue)
and
7ct Topaz Oval (15.29×10.19mm, 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 Topaz for a given
carat weight, because it has higher specific gravity
(4 vs. 3.53 - this means it's "heavier" compared to Topaz 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.
| 7 Ct Sapphire (Oval) | 7 Ct Topaz (Oval) | |
| 14.67×9.78 mm | vs | 15.29×10.19 mm |
| 117.65 mm² | 127.76 mm² |
| 7ct Sapphire Oval (14.67×9.78mm) | |
| 7ct Topaz Oval (15.29×10.19mm) | |
| Difference: 9% (10.11 mm²) |
7ct Topaz (Oval, 15.29×10.19mm) has approx. 9% more face-up area than 7ct Sapphire (Oval, 14.67×9.78mm).
Popular comparisons:
- 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)
- 15ct Sapphire (Oval, Blue, 18 x 13) vs. 13ct Sapphire (Oval, Blue, 16 x 12)
- 2ct Sapphire (Oval, Blue, 9.53 x 6.35) vs. 3ct Sapphire (Oval, Blue, 10.91 x 7.27)
- 6ct Sapphire (Oval, Blue, 13.74 x 9.16) vs. 8ct Sapphire (Oval, Blue, 15.12 x 10.08)