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24ct Rhodolite (Round, 17.48×17.48mm, Purple) vs 24ct Tourmaline (Round, 18.86×18.86mm, Purple)


Quick summary: When looked from above (face-up position), 24ct Tourmaline (18.86×18.86mm, round cut) appears 16% larger than 24ct Rhodolite (17.48×17.48mm, round cut). See below how they compare side-by-side on a ring and finger.

24ct Rhodolite (round cut)
vs
 24ct Tourmaline (round cut)
purple
 
purple
17.48×17.48 mm 18.86×18.86 mm
actual size
Actual size of 24ct Rhodolite (round cut, 17.48×17.48mm, Purple color)   Actual size of 24ct Tourmaline (round cut, 18.86×18.86mm, Purple color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 24ct Rhodolite (round cut, 17.48×17.48mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 24ct Tourmaline (round cut, 18.86×18.86mm) 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
 104% vs 112%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 24ct Rhodolite Round (17.48×17.48mm, Purple) and 24ct Tourmaline Round (18.86×18.86mm, 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.


24 Ct Rhodolite (Round) 24 Ct Tourmaline (Round)
17.48×17.48 mm vs 18.86×18.86 mm
239.98 mm²   279.37 mm²
Face-up size outline for 24ct Tourmaline (18.86×18.86mm, round cut)
Face-up size outline for 24ct Rhodolite (17.48×17.48mm, round cut)
24ct Rhodolite Round (17.48×17.48mm)
24ct Tourmaline Round (18.86×18.86mm)
Difference: 16% (39.39 mm²)
24ct Tourmaline (Round, 18.86×18.86mm) has approx. 16% more face-up area than 24ct Rhodolite (Round, 17.48×17.48mm).


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