5ct Sapphire (Cabochon, 10×10mm, Dark Blue) vs 8ct Ruby (Cabochon, 13.68×9.12mm, Red)
Quick summary: When looked from above (face-up position), 8ct Ruby (13.68×9.12mm, cabochon cut) appears 25% larger than 5ct Sapphire (10×10mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 5ct Sapphire (cabochon cut) |
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8ct Ruby (cabochon cut) |
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dark blue |
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| 10×10 mm | 13.68×9.12 mm | |
| actual size | ||
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Actual sizes of
5ct Sapphire Cabochon (10×10mm, Dark Blue)
and
8ct Ruby Cabochon (13.68×9.12mm, Red)
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
Sapphire and Ruby have the same specific gravity so their face-up size
depends on the weight, shape and 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.
| 5 Ct Sapphire (Cabochon) | 8 Ct Ruby (Cabochon) | |
| 10×10 mm | vs | 13.68×9.12 mm |
| 82 mm² | 102.3 mm² |
| 5ct Sapphire Cabochon (10×10mm) | |
| 8ct Ruby Cabochon (13.68×9.12mm) | |
| Difference: 25% (20.3 mm²) |
8ct Ruby Cabochon (13.68×9.12mm) has approx. 25% more face-up area than 5ct Sapphire Cabochon (10×10mm).
Popular comparisons:
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 10.3ct Amethyst (Cabochon, Dark Violet, 16 x 12)
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 10.3ct Ruby (Cabochon, Red, 14.9 x 9.93)
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 10.3ct Emerald (Cabochon, Green, 16.98 x 11.32)
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 10.3ct Sapphire (Cabochon, Dark Blue, 16 x 12)
- 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)
- 3.9ct Sapphire (Cabochon, Blue, 9.5 x 7.8) vs. 2.94ct Sapphire (Cabochon, Purple, 8.25 x 6.98)
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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.