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10ct Emerald (Princess, 12.87×12.87mm, Green) vs 10ct Tourmaline (Princess, 12.37×12.37mm, Purple)


Quick summary: When looked from above (face-up position), 10ct Emerald (12.87×12.87mm, princess cut) appears 8% larger than 10ct Tourmaline (12.37×12.37mm, princess cut). See below how they compare side-by-side on a ring and finger.

10ct Emerald (princess cut)
vs
 10ct Tourmaline (princess cut)
green
 
purple
12.87×12.87 mm 12.37×12.37 mm
actual size
Actual size of 10ct Emerald (princess cut, 12.87×12.87mm, Green color)   Actual size of 10ct Tourmaline (princess cut, 12.37×12.37mm, Purple color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 10ct Emerald (princess cut, 12.87×12.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 10ct Tourmaline (princess cut, 12.37×12.37mm) 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
 77% vs 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Emerald Princess (12.87×12.87mm, Green) and 10ct Tourmaline Princess (12.37×12.37mm, 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, Tourmaline will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.06 vs. 2.72 - this means it's "heavier" compared to Emerald 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.


10 Ct Emerald (Princess) 10 Ct Tourmaline (Princess)
12.87×12.87 mm vs 12.37×12.37 mm
165.64 mm²   153.02 mm²
Face-up size outline for 10ct Emerald (12.87×12.87mm, princess cut)
Face-up size outline for 10ct Tourmaline (12.37×12.37mm, princess cut)
10ct Emerald Princess (12.87×12.87mm)
10ct Tourmaline Princess (12.37×12.37mm)
Difference: 8% (12.62 mm²)
10ct Emerald (Princess, 12.87×12.87mm) has approx. 8% more face-up area than 10ct Tourmaline (Princess, 12.37×12.37mm).


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