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7ct Tourmaline (Round, 12.5×12.5mm, Purple) vs 7ct Sapphire (Round, 11.44×11.44mm, Blue)


Quick summary: When looked from above (face-up position), 7ct Tourmaline (12.5×12.5mm, round cut) appears 19% larger than 7ct Sapphire (11.44×11.44mm, round cut). See below how they compare side-by-side on a ring and finger.

7ct Tourmaline (round cut)
vs
 7ct Sapphire (round cut)
purple
 
blue
12.5×12.5 mm 11.44×11.44 mm
actual size
Actual size of 7ct Tourmaline (round cut, 12.5×12.5mm, Purple color)   Actual size of 7ct Sapphire (round cut, 11.44×11.44mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 7ct Tourmaline (round cut, 12.5×12.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7ct Sapphire (round cut, 11.44×11.44mm) 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 68%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Tourmaline Round (12.5×12.5mm, Purple) and 7ct Sapphire Round (11.44×11.44mm, 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.


7 Ct Tourmaline (Round) 7 Ct Sapphire (Round)
12.5×12.5 mm vs 11.44×11.44 mm
122.72 mm²   102.79 mm²
Face-up size outline for 7ct Tourmaline (12.5×12.5mm, round cut)
Face-up size outline for 7ct Sapphire (11.44×11.44mm, round cut)
7ct Tourmaline Round (12.5×12.5mm)
7ct Sapphire Round (11.44×11.44mm)
Difference: 19% (19.93 mm²)
7ct Tourmaline (Round, 12.5×12.5mm) has approx. 19% more face-up area than 7ct Sapphire (Round, 11.44×11.44mm).


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