×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

10ct Tourmaline (Princess, 12.37×12.37mm, Purple) vs 10ct Sapphire (Princess, 11.32×11.32mm, Blue)


Quick summary: When looked from above (face-up position), 10ct Tourmaline (12.37×12.37mm, princess cut) appears 19% larger than 10ct Sapphire (11.32×11.32mm, princess cut). See below how they compare side-by-side on a ring and finger.

10ct Tourmaline (princess cut)
vs
 10ct Sapphire (princess cut)
purple
 
blue
12.37×12.37 mm 11.32×11.32 mm
actual size
Actual size of 10ct Tourmaline (princess cut, 12.37×12.37mm, Purple color)   Actual size of 10ct Sapphire (princess cut, 11.32×11.32mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 10ct Tourmaline (princess cut, 12.37×12.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Sapphire (princess cut, 11.32×11.32mm) 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
 74% vs 67%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 10ct Tourmaline Princess (12.37×12.37mm, Purple) and 10ct Sapphire Princess (11.32×11.32mm, Blue) 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, Sapphire will face-up smaller than Tourmaline for a given carat weight, because it has higher specific gravity (4 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.


10 Ct Tourmaline (Princess) 10 Ct Sapphire (Princess)
12.37×12.37 mm vs 11.32×11.32 mm
153.02 mm²   128.14 mm²
Face-up size outline for 10ct Tourmaline (12.37×12.37mm, princess cut)
Face-up size outline for 10ct Sapphire (11.32×11.32mm, princess cut)
10ct Tourmaline Princess (12.37×12.37mm)
10ct Sapphire Princess (11.32×11.32mm)
Difference: 19% (24.88 mm²)
10ct Tourmaline (Princess, 12.37×12.37mm) has approx. 19% more face-up area than 10ct Sapphire (Princess, 11.32×11.32mm).


Popular comparisons: