4.5ct Rhodolite (Marquise, 16.28×8.14mm, Purple) vs 4.5ct Amethyst (Marquise, 18.42×9.21mm, Violet)
Quick summary: When looked from above (face-up position), 4.5ct Amethyst (18.42×9.21mm, marquise cut) appears 28% larger than 4.5ct Rhodolite (16.28×8.14mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 4.5ct Rhodolite (marquise cut) |
vs
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4.5ct Amethyst (marquise cut) |
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purple |
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| 16.28×8.14 mm | 18.42×9.21 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
4.5ct Rhodolite Marquise (16.28×8.14mm, Purple)
and
4.5ct Amethyst Marquise (18.42×9.21mm, 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, Rhodolite will face-up smaller than Amethyst for a given
carat weight, because it has higher specific gravity
(3.84 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.
| 4.5 Ct Rhodolite (Marquise) | 4.5 Ct Amethyst (Marquise) | |
| 16.28×8.14 mm | vs | 18.42×9.21 mm |
| 94.09 mm² | 120.45 mm² |
| 4.5ct Rhodolite Marquise (16.28×8.14mm) | |
| 4.5ct Amethyst Marquise (18.42×9.21mm) | |
| Difference: 28% (26.36 mm²) |
4.5ct Amethyst (Marquise, 18.42×9.21mm) has approx. 28% more face-up area than 4.5ct Rhodolite (Marquise, 16.28×8.14mm).
Popular comparisons:
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