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3.5ct Diamond (Round, 9.87×9.87mm, White) vs 2.29ct Tourmaline (Pear, 11.85×8.84mm, Bluish Green)


Quick summary: When looked from above (face-up position), 3.5ct Diamond (9.87×9.87mm, round cut) appears 0.1% larger than 2.29ct Tourmaline (11.85×8.84mm, pear cut). See below how they compare side-by-side on a ring and finger.

3.5ct Diamond (round cut)
vs
 2.29ct Tourmaline (pear cut)
white
 
bluish green
9.87×9.87 mm 11.85×8.84 mm
actual size
Actual size of 3.5ct Diamond (round cut, 9.87×9.87mm, White color)   Actual size of 2.29ct Tourmaline (pear cut, 11.85×8.84mm, Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 3.5ct Diamond (round cut, 9.87×9.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 2.29ct Tourmaline (pear cut, 11.85×8.84mm) 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
 59% vs 53%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3.5ct Diamond Round (9.87×9.87mm, White) and 2.29ct Tourmaline Pear (11.85×8.84mm, Bluish Green) 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, Diamond will face-up smaller than Tourmaline for a given carat weight, because it has higher specific gravity (3.52 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.


3.5 Ct Diamond (Round) 2.29 Ct Tourmaline (Pear)
9.87×9.87 mm vs 11.85×8.84 mm
76.51 mm²   76.47 mm²
Face-up size outline for 3.5ct Diamond (9.87×9.87mm, round cut)
Face-up size outline for 2.29ct Tourmaline (11.85×8.84mm, pear cut)
3.5ct Diamond Round (9.87×9.87mm)
2.29ct Tourmaline Pear (11.85×8.84mm)
Difference: 0.1% (0.04 mm²)
3.5ct Diamond (Round, 9.87×9.87mm) has approx. 0.1% more face-up area than 2.29ct Tourmaline (Pear, 11.85×8.84mm).


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