8.5ct Rhodolite (Oval, 15.86×10.57mm, Purple) vs 8.5ct Amethyst (Oval, 17.96×11.97mm, Violet)
Quick summary: When looked from above (face-up position), 8.5ct Amethyst (17.96×11.97mm, oval cut) appears 28% larger than 8.5ct Rhodolite (15.86×10.57mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 8.5ct Rhodolite (oval cut) |
vs
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8.5ct Amethyst (oval cut) |
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purple |
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| 15.86×10.57 mm | 17.96×11.97 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
8.5ct Rhodolite Oval (15.86×10.57mm, Purple)
and
8.5ct Amethyst Oval (17.96×11.97mm, 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.
| 8.5 Ct Rhodolite (Oval) | 8.5 Ct Amethyst (Oval) | |
| 15.86×10.57 mm | vs | 17.96×11.97 mm |
| 137.46 mm² | 176.28 mm² |
| 8.5ct Rhodolite Oval (15.86×10.57mm) | |
| 8.5ct Amethyst Oval (17.96×11.97mm) | |
| Difference: 28% (38.82 mm²) |
8.5ct Amethyst (Oval, 17.96×11.97mm) has approx. 28% more face-up area than 8.5ct Rhodolite (Oval, 15.86×10.57mm).
Popular comparisons:
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- 1ct Topaz (Round, Blue, 6 x 6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)