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2.5ct Tourmaline (Round, 8.87×8.87mm, Purple) vs 2.5ct Sapphire (Round, 8.11×8.11mm, Blue)


Quick summary: When looked from above (face-up position), 2.5ct Tourmaline (8.87×8.87mm, round cut) appears 20% larger than 2.5ct Sapphire (8.11×8.11mm, round cut). See below how they compare side-by-side on a ring and finger.

2.5ct Tourmaline (round cut)
vs
 2.5ct Sapphire (round cut)
purple
 
blue
8.87×8.87 mm 8.11×8.11 mm
actual size
Actual size of 2.5ct Tourmaline (round cut, 8.87×8.87mm, Purple color)   Actual size of 2.5ct Sapphire (round cut, 8.11×8.11mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 2.5ct Tourmaline (round cut, 8.87×8.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2.5ct Sapphire (round cut, 8.11×8.11mm) 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
 53% vs 48%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.5ct Tourmaline Round (8.87×8.87mm, Purple) and 2.5ct Sapphire Round (8.11×8.11mm, 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.


2.5 Ct Tourmaline (Round) 2.5 Ct Sapphire (Round)
8.87×8.87 mm vs 8.11×8.11 mm
61.79 mm²   51.66 mm²
Face-up size outline for 2.5ct Tourmaline (8.87×8.87mm, round cut)
Face-up size outline for 2.5ct Sapphire (8.11×8.11mm, round cut)
2.5ct Tourmaline Round (8.87×8.87mm)
2.5ct Sapphire Round (8.11×8.11mm)
Difference: 20% (10.13 mm²)
2.5ct Tourmaline (Round, 8.87×8.87mm) has approx. 20% more face-up area than 2.5ct Sapphire (Round, 8.11×8.11mm).


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