40ct Sapphire (Baguette, 23.7×15.8mm, Blue) vs 40ct Amethyst (Oval, 29.67×19.78mm, Violet)
Quick summary: When looked from above (face-up position), 40ct Amethyst (29.67×19.78mm, oval cut) appears 29% larger than 40ct Sapphire (23.7×15.8mm, baguette cut). See below how they compare side-by-side on a ring and finger.
| 40ct Sapphire (baguette cut) |
vs
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40ct Amethyst (oval cut) |
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blue |
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| 23.7×15.8 mm | 29.67×19.78 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
40ct Sapphire Baguette (23.7×15.8mm, Blue)
and
40ct Amethyst Oval (29.67×19.78mm, 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.
| 40 Ct Sapphire (Baguette) | 40 Ct Amethyst (Oval) | |
| 23.7×15.8 mm | vs | 29.67×19.78 mm |
| 374.46 mm² | 481.24 mm² |
| 40ct Sapphire Baguette (23.7×15.8mm) | |
| 40ct Amethyst Oval (29.67×19.78mm) | |
| Difference: 29% (106.78 mm²) |
40ct Amethyst (Oval, 29.67×19.78mm) has approx. 29% more face-up area than 40ct Sapphire (Baguette, 23.7×15.8mm).
Popular comparisons:
- 40ct Sapphire (Baguette, Blue, 23.7 x 15.8) vs. 1ct Peridot (Oval, Yellowish Green, 8.03 x 5.35)
- 20ct Sapphire (Baguette, Blue, 18.81 x 12.54) vs. 1ct Peridot (Oval, Yellowish Green, 8.03 x 5.35)
- 1ct Sapphire (Baguette, Blue, 6.93 x 4.62) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.15ct Sapphire (Baguette, Blue, 3.68 x 2.45) vs. 3.05ct Diamond (Emerald, White, 9.69 x 7.18)
- 0.15ct Sapphire (Baguette, Blue, 3.68 x 2.45) vs. 0.15ct Diamond (Emerald, White, 3.55 x 2.63)
- 2ct Sapphire (Baguette, Blue, 8.73 x 5.82) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 2.3ct Sapphire (Baguette, Dark Blue, 9.15 x 6.1) vs. 2.3ct Sapphire (Emerald, Dark Blue, 8.42 x 6.24)
- 4ct Sapphire (Baguette, Yellow, 12 x 6) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)