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28ct Rhodolite (Cushion, 17.04×17.04mm, Purple) vs 28ct Tourmaline (Cushion, 18.38×18.38mm, Purple)


Quick summary: When looked from above (face-up position), 28ct Tourmaline (18.38×18.38mm, cushion cut) appears 16% larger than 28ct Rhodolite (17.04×17.04mm, cushion cut). See below how they compare side-by-side on a ring and finger.

28ct Rhodolite (cushion cut)
vs
 28ct Tourmaline (cushion cut)
purple
 
purple
17.04×17.04 mm 18.38×18.38 mm
actual size
Actual size of 28ct Rhodolite (cushion cut, 17.04×17.04mm, Purple color)   Actual size of 28ct Tourmaline (cushion cut, 18.38×18.38mm, Purple color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 28ct Rhodolite (cushion cut, 17.04×17.04mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 28ct Tourmaline (cushion cut, 18.38×18.38mm) 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
 101% vs 109%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 28ct Rhodolite Cushion (17.04×17.04mm, Purple) and 28ct Tourmaline Cushion (18.38×18.38mm, 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.


28 Ct Rhodolite (Cushion) 28 Ct Tourmaline (Cushion)
17.04×17.04 mm vs 18.38×18.38 mm
261.33 mm²   304.04 mm²
Face-up size outline for 28ct Tourmaline (18.38×18.38mm, cushion cut)
Face-up size outline for 28ct Rhodolite (17.04×17.04mm, cushion cut)
28ct Rhodolite Cushion (17.04×17.04mm)
28ct Tourmaline Cushion (18.38×18.38mm)
Difference: 16% (42.71 mm²)
28ct Tourmaline (Cushion, 18.38×18.38mm) has approx. 16% more face-up area than 28ct Rhodolite (Cushion, 17.04×17.04mm).


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