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7ct Emerald (Round, 13.01×13.01mm, Green) vs 7ct Tourmaline (Round, 12.5×12.5mm, Purple)


Quick summary: When looked from above (face-up position), 7ct Emerald (13.01×13.01mm, round cut) appears 8% larger than 7ct Tourmaline (12.5×12.5mm, round cut). See below how they compare side-by-side on a ring and finger.

7ct Emerald (round cut)
vs
 7ct Tourmaline (round cut)
green
 
purple
13.01×13.01 mm 12.5×12.5 mm
actual size
Actual size of 7ct Emerald (round cut, 13.01×13.01mm, Green color)   Actual size of 7ct Tourmaline (round cut, 12.5×12.5mm, Purple color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 7ct Emerald (round cut, 13.01×13.01mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 7ct Tourmaline (round cut, 12.5×12.5mm) 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
 77% vs 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Emerald Round (13.01×13.01mm, Green) and 7ct Tourmaline Round (12.5×12.5mm, Purple) 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, Tourmaline will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.06 vs. 2.72 - this means it's "heavier" compared to Emerald 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 Emerald (Round) 7 Ct Tourmaline (Round)
13.01×13.01 mm vs 12.5×12.5 mm
132.94 mm²   122.72 mm²
Face-up size outline for 7ct Emerald (13.01×13.01mm, round cut)
Face-up size outline for 7ct Tourmaline (12.5×12.5mm, round cut)
7ct Emerald Round (13.01×13.01mm)
7ct Tourmaline Round (12.5×12.5mm)
Difference: 8% (10.22 mm²)
7ct Emerald (Round, 13.01×13.01mm) has approx. 8% more face-up area than 7ct Tourmaline (Round, 12.5×12.5mm).


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