8ct Sapphire (Cabochon, 13.68×9.12mm, Blue) vs 8ct Topaz (Cabochon, 14.27×9.51mm, Blue)
Quick summary: When looked from above (face-up position), 8ct Topaz (14.27×9.51mm, cabochon cut) appears 9% larger than 8ct Sapphire (13.68×9.12mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 8ct Sapphire (cabochon cut) |
vs
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8ct Topaz (cabochon cut) |
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blue |
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| 13.68×9.12 mm | 14.27×9.51 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
8ct Sapphire Cabochon (13.68×9.12mm, Blue)
and
8ct Topaz Cabochon (14.27×9.51mm, 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.
| 8 Ct Sapphire (Cabochon) | 8 Ct Topaz (Cabochon) | |
| 13.68×9.12 mm | vs | 14.27×9.51 mm |
| 102.3 mm² | 111.28 mm² |
| 8ct Sapphire Cabochon (13.68×9.12mm) | |
| 8ct Topaz Cabochon (14.27×9.51mm) | |
| Difference: 9% (8.98 mm²) |
8ct Topaz (Cabochon, 14.27×9.51mm) has approx. 9% more face-up area than 8ct Sapphire (Cabochon, 13.68×9.12mm).
Popular comparisons:
- 8ct Sapphire (Cabochon, Blue, 13.68 x 9.12) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 2ct Sapphire (Cabochon, Dark Blue, 8 x 6) vs. 2.27ct Sapphire (Cabochon, Light Blue, 8 x 6.1)
- 2ct Sapphire (Cabochon, Blue, 8.63 x 5.75) vs. 2ct Diamond (Cabochon, White, 9 x 6)
- 2ct Sapphire (Cabochon, Blue, 8.63 x 5.75) vs. 2ct Ruby (Oval, Red, 9.53 x 6.35)
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 8ct Ruby (Cabochon, Red, 13.68 x 9.12)
- 3.9ct Sapphire (Cabochon, Blue, 9.5 x 7.8) vs. 2.94ct Sapphire (Cabochon, Purple, 8.25 x 6.98)
- 1.92ct Sapphire (Cabochon, Blue, 8.51 x 5.67) vs. 0.74ct Sapphire (Cabochon, Blue, 6.2 x 4.13)
- 3ct Sapphire (Cabochon, Orange, 9.87 x 6.58) vs. 3ct Sapphire (Oval, Light Orange, 8 x 10)
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 10.3ct Amethyst (Cabochon, Dark Violet, 16 x 12)