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20ct Rhodolite (Cushion, 15.23×15.23mm, Purple) vs 20ct Tourmaline (Cushion, 16.43×16.43mm, Purple)


Quick summary: When looked from above (face-up position), 20ct Tourmaline (16.43×16.43mm, cushion cut) appears 16% larger than 20ct Rhodolite (15.23×15.23mm, cushion cut). See below how they compare side-by-side on a ring and finger.

20ct Rhodolite (cushion cut)
vs
 20ct Tourmaline (cushion cut)
purple
 
purple
15.23×15.23 mm 16.43×16.43 mm
actual size
Actual size of 20ct Rhodolite (cushion cut, 15.23×15.23mm, Purple color)   Actual size of 20ct Tourmaline (cushion cut, 16.43×16.43mm, Purple color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 20ct Rhodolite (cushion cut, 15.23×15.23mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 20ct Tourmaline (cushion cut, 16.43×16.43mm) 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
 91% vs 98%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 20ct Rhodolite Cushion (15.23×15.23mm, Purple) and 20ct Tourmaline Cushion (16.43×16.43mm, Purple) 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 Tourmaline for a given carat weight, because it has higher specific gravity (3.84 vs. 3.06 - this means it's "heavier" compared to Tourmaline 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.


20 Ct Rhodolite (Cushion) 20 Ct Tourmaline (Cushion)
15.23×15.23 mm vs 16.43×16.43 mm
208.76 mm²   242.95 mm²
Face-up size outline for 20ct Tourmaline (16.43×16.43mm, cushion cut)
Face-up size outline for 20ct Rhodolite (15.23×15.23mm, cushion cut)
20ct Rhodolite Cushion (15.23×15.23mm)
20ct Tourmaline Cushion (16.43×16.43mm)
Difference: 16% (34.19 mm²)
20ct Tourmaline (Cushion, 16.43×16.43mm) has approx. 16% more face-up area than 20ct Rhodolite (Cushion, 15.23×15.23mm).


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