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8.5ct Tourmaline (Princess, 11.72×11.72mm, Purple) vs 8.5ct Sapphire (Princess, 10.72×10.72mm, Blue)


Quick summary: When looked from above (face-up position), 8.5ct Tourmaline (11.72×11.72mm, princess cut) appears 20% larger than 8.5ct Sapphire (10.72×10.72mm, princess cut). See below how they compare side-by-side on a ring and finger.

8.5ct Tourmaline (princess cut)
vs
 8.5ct Sapphire (princess cut)
purple
 
blue
11.72×11.72 mm 10.72×10.72 mm
actual size
Actual size of 8.5ct Tourmaline (princess cut, 11.72×11.72mm, Purple color)   Actual size of 8.5ct Sapphire (princess cut, 10.72×10.72mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 8.5ct Tourmaline (princess cut, 11.72×11.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8.5ct Sapphire (princess cut, 10.72×10.72mm) 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
 70% vs 64%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 8.5ct Tourmaline Princess (11.72×11.72mm, Purple) and 8.5ct Sapphire Princess (10.72×10.72mm, 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.


8.5 Ct Tourmaline (Princess) 8.5 Ct Sapphire (Princess)
11.72×11.72 mm vs 10.72×10.72 mm
137.36 mm²   114.92 mm²
Face-up size outline for 8.5ct Tourmaline (11.72×11.72mm, princess cut)
Face-up size outline for 8.5ct Sapphire (10.72×10.72mm, princess cut)
8.5ct Tourmaline Princess (11.72×11.72mm)
8.5ct Sapphire Princess (10.72×10.72mm)
Difference: 20% (22.44 mm²)
8.5ct Tourmaline (Princess, 11.72×11.72mm) has approx. 20% more face-up area than 8.5ct Sapphire (Princess, 10.72×10.72mm).


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