0.85ct Sapphire (Oval, 7.17×4.78mm, Blue) vs 9ct Amethyst (Oval, 18.05×12.03mm, Violet)
Quick summary: When looked from above (face-up position), 9ct Amethyst (18.05×12.03mm, oval cut) appears 6.3 times larger than 0.85ct Sapphire (7.17×4.78mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 0.85ct Sapphire (oval cut) |
vs
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9ct Amethyst (oval cut) |
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blue |
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| 7.17×4.78 mm | 18.05×12.03 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
0.85ct Sapphire Oval (7.17×4.78mm, Blue)
and
9ct Amethyst Oval (18.05×12.03mm, 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.
| 0.85 Ct Sapphire (Oval) | 9 Ct Amethyst (Oval) | |
| 7.17×4.78 mm | vs | 18.05×12.03 mm |
| 28.1 mm² | 178.06 mm² |
| 0.85ct Sapphire Oval (7.17×4.78mm) | |
| 9ct Amethyst Oval (18.05×12.03mm) | |
| Difference: 534% (149.96 mm²) |
9ct Amethyst (Oval, 18.05×12.03mm) has approx. 534% more face-up area than 0.85ct Sapphire (Oval, 7.17×4.78mm). In other words, it's 6.34x larger.
Popular comparisons:
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 0.39ct Citrine (Round, Light Orange, 5.01 x 5.01)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 0.13ct Diamond (Round, White, 3.29 x 3.29)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 0.06ct Sapphire (Oval, Blue, 2.96 x 1.97)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 1.6ct Diamond (Round, White, 7.6 x 7.6)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 1.6ct Sapphire (Round, Blue, 6.99 x 6.99)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 1.33ct Sapphire (Oval, Blue, 8.33 x 5.55)
- 0.85ct Sapphire (Oval, Blue, 7.17 x 4.78) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)