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4.5ct Rhodolite (Cushion, 9.26×9.26mm, Purple) vs 4.5ct Amethyst (Cushion, 10.48×10.48mm, Violet)


Quick summary: When looked from above (face-up position), 4.5ct Amethyst (10.48×10.48mm, cushion cut) appears 28% larger than 4.5ct Rhodolite (9.26×9.26mm, cushion cut). See below how they compare side-by-side on a ring and finger.

4.5ct Rhodolite (cushion cut)
vs
 4.5ct Amethyst (cushion cut)
purple
 
violet
9.26×9.26 mm 10.48×10.48 mm
actual size
Actual size of 4.5ct Rhodolite (cushion cut, 9.26×9.26mm, Purple color)   Actual size of 4.5ct Amethyst (cushion cut, 10.48×10.48mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 4.5ct Rhodolite (cushion cut, 9.26×9.26mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 4.5ct Amethyst (cushion cut, 10.48×10.48mm) 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 63%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 4.5ct Rhodolite Cushion (9.26×9.26mm, Purple) and 4.5ct Amethyst Cushion (10.48×10.48mm, 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.


4.5 Ct Rhodolite (Cushion) 4.5 Ct Amethyst (Cushion)
9.26×9.26 mm vs 10.48×10.48 mm
77.17 mm²   98.85 mm²
Face-up size outline for 4.5ct Amethyst (10.48×10.48mm, cushion cut)
Face-up size outline for 4.5ct Rhodolite (9.26×9.26mm, cushion cut)
4.5ct Rhodolite Cushion (9.26×9.26mm)
4.5ct Amethyst Cushion (10.48×10.48mm)
Difference: 28% (21.68 mm²)
4.5ct Amethyst (Cushion, 10.48×10.48mm) has approx. 28% more face-up area than 4.5ct Rhodolite (Cushion, 9.26×9.26mm).


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