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6.5ct Rhodolite (Marquise, 18.4×9.2mm, Purple) vs 6.5ct Amethyst (Marquise, 20.82×10.41mm, Violet)


Quick summary: When looked from above (face-up position), 6.5ct Amethyst (20.82×10.41mm, marquise cut) appears 28% larger than 6.5ct Rhodolite (18.4×9.2mm, marquise cut). See below how they compare side-by-side on a ring and finger.

6.5ct Rhodolite (marquise cut)
vs
 6.5ct Amethyst (marquise cut)
purple
 
violet
18.4×9.2 mm 20.82×10.41 mm
actual size
Actual size of 6.5ct Rhodolite (marquise cut, 18.4×9.2mm, Purple color)   Actual size of 6.5ct Amethyst (marquise cut, 20.82×10.41mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 6.5ct Rhodolite (marquise cut, 18.4×9.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 6.5ct Amethyst (marquise cut, 20.82×10.41mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 55% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 6.5ct Rhodolite Marquise (18.4×9.2mm, Purple) and 6.5ct Amethyst Marquise (20.82×10.41mm, 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.


6.5 Ct Rhodolite (Marquise) 6.5 Ct Amethyst (Marquise)
18.4×9.2 mm vs 20.82×10.41 mm
120.19 mm²   153.88 mm²
Face-up size outline for 6.5ct Amethyst (20.82×10.41mm, marquise cut)
Face-up size outline for 6.5ct Rhodolite (18.4×9.2mm, marquise cut)
6.5ct Rhodolite Marquise (18.4×9.2mm)
6.5ct Amethyst Marquise (20.82×10.41mm)
Difference: 28% (33.69 mm²)
6.5ct Amethyst (Marquise, 20.82×10.41mm) has approx. 28% more face-up area than 6.5ct Rhodolite (Marquise, 18.4×9.2mm).


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