10ct Sapphire (Cabochon, 14.75×9.83mm, Blue) vs 3ct Diamond (Oval, 11.7×7.8mm, White)
Quick summary: When looked from above (face-up position), 10ct Sapphire (14.75×9.83mm, cabochon cut) appears 59% larger than 3ct Diamond (11.7×7.8mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 10ct Sapphire (cabochon cut) |
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3ct Diamond (oval cut) |
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| 14.75×9.83 mm | 11.7×7.8 mm | |
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Actual sizes of
10ct Sapphire Cabochon (14.75×9.83mm, Blue)
and
3ct Diamond Oval (11.7×7.8mm, 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.
| 10 Ct Sapphire (Cabochon) | 3 Ct Diamond (Oval) | |
| 14.75×9.83 mm | vs | 11.7×7.8 mm |
| 118.89 mm² | 74.83 mm² |
| 10ct Sapphire Cabochon (14.75×9.83mm) | |
| 3ct Diamond Oval (11.7×7.8mm) | |
| Difference: 59% (44.06 mm²) |
10ct Sapphire Cabochon (14.75×9.83mm) has approx. 59% more face-up area than 3ct Diamond Oval (11.7×7.8mm).
Popular comparisons:
- 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)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.