24ct Amethyst (Round, 19.78×19.78mm, Violet) vs 24ct Diamond (Marquise, 29.96×14.98mm, Green)
Quick summary: When looked from above (face-up position), 24ct Colored Diamond (29.96×14.98mm, marquise cut) appears 4% larger than 24ct Amethyst (19.78×19.78mm, round cut). See below how they compare side-by-side on a ring and finger.
| 24ct Amethyst (round cut) |
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24ct Diamond (marquise cut) |
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violet |
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| 19.78×19.78 mm | 29.96×14.98 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
24ct Amethyst Round (19.78×19.78mm, Violet)
and
24ct Diamond Marquise (29.96×14.98mm, Green)
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, Diamond will face-up smaller than Amethyst for a given
carat weight, because it has higher specific gravity
(3.52 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.
| 24 Ct Amethyst (Round) | 24 Ct Colored Diamond (Marquise) | |
| 19.78×19.78 mm | vs | 29.96×14.98 mm |
| 307.29 mm² | 318.65 mm² |
| 24ct Amethyst Round (19.78×19.78mm) | |
| 24ct Colored Diamond Marquise (29.96×14.98mm) | |
| Difference: 4% (11.36 mm²) |
24ct Colored Diamond (Marquise, 29.96×14.98mm) has approx. 4% more face-up area than 24ct Amethyst (Round, 19.78×19.78mm).
Popular comparisons:
- 24ct Amethyst (Round, Violet, 19.78 x 19.78) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04)
- 2ct Amethyst (Round, Violet, 8.64 x 8.64) vs. 2ct Amethyst (Oval, Violet, 10.94 x 7.29)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)
- 8ct Amethyst (Round, Violet, 13.72 x 13.72) vs. 8ct Emerald (Emerald, Green, 14.55 x 10.78)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Zircon (Round, Orange, 5.67 x 5.67)