5ct Sapphire (Cabochon, 10×10mm, Dark Blue) vs 10.3ct Amethyst (Cabochon, 16×12mm, Dark Violet)
Quick summary: When looked from above (face-up position), 10.3ct Amethyst (16×12mm, cabochon cut) appears 92% 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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10.3ct Amethyst (cabochon cut) |
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dark blue |
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| 10×10 mm | 16×12 mm | |
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Actual sizes of
5ct Sapphire Cabochon (10×10mm, Dark Blue)
and
10.3ct Amethyst Cabochon (16×12mm, Dark Violet)
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 Amethyst for a given
carat weight, because it has higher specific gravity
(4 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.
| 5 Ct Sapphire (Cabochon) | 10.3 Ct Amethyst (Cabochon) | |
| 10×10 mm | vs | 16×12 mm |
| 82 mm² | 157.44 mm² |
| 5ct Sapphire Cabochon (10×10mm) | |
| 10.3ct Amethyst Cabochon (16×12mm) | |
| Difference: 92% (75.44 mm²) |
10.3ct Amethyst Cabochon (16×12mm) has approx. 92% more face-up area than 5ct Sapphire Cabochon (10×10mm).
Popular comparisons:
- 5ct Sapphire (Cabochon, Dark Blue, 10 x 10) vs. 8ct Ruby (Cabochon, Red, 13.68 x 9.12)
- 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.