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10ct Tourmaline (Round, 14.08×14.08mm, Purple) vs 10ct Sapphire (Round, 12.88×12.88mm, Blue)


Quick summary: When looked from above (face-up position), 10ct Tourmaline (14.08×14.08mm, round cut) appears 20% larger than 10ct Sapphire (12.88×12.88mm, round cut). See below how they compare side-by-side on a ring and finger.

10ct Tourmaline (round cut)
vs
 10ct Sapphire (round cut)
purple
 
blue
14.08×14.08 mm 12.88×12.88 mm
actual size
Actual size of 10ct Tourmaline (round cut, 14.08×14.08mm, Purple color)   Actual size of 10ct Sapphire (round cut, 12.88×12.88mm, 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 (round cut, 14.08×14.08mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Sapphire (round cut, 12.88×12.88mm) 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
 84% vs 77%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Tourmaline Round (14.08×14.08mm, Purple) and 10ct Sapphire Round (12.88×12.88mm, 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 (Round) 10 Ct Sapphire (Round)
14.08×14.08 mm vs 12.88×12.88 mm
155.7 mm²   130.29 mm²
Face-up size outline for 10ct Tourmaline (14.08×14.08mm, round cut)
Face-up size outline for 10ct Sapphire (12.88×12.88mm, round cut)
10ct Tourmaline Round (14.08×14.08mm)
10ct Sapphire Round (12.88×12.88mm)
Difference: 20% (25.41 mm²)
10ct Tourmaline (Round, 14.08×14.08mm) has approx. 20% more face-up area than 10ct Sapphire (Round, 12.88×12.88mm).


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