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4ct Tourmaline (Cabochon, 11.82×7.88mm, Violet) vs 5ct Emerald (Cabochon, 13.34×8.89mm, Green)


Quick summary: When looked from above (face-up position), 5ct Emerald (13.34×8.89mm, cabochon cut) appears 27% larger than 4ct Tourmaline (11.82×7.88mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

4ct Tourmaline (cabochon cut)
vs
 5ct Emerald (cabochon cut)
violet
 
green
11.82×7.88 mm 13.34×8.89 mm
actual size
Actual size of 4ct Tourmaline (cabochon cut, 11.82×7.88mm, Violet color)   Actual size of 5ct Emerald (cabochon cut, 13.34×8.89mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 4ct Tourmaline (cabochon cut, 11.82×7.88mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 5ct Emerald (cabochon cut, 13.34×8.89mm) 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
 47% vs 53%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Tourmaline Cabochon (11.82×7.88mm, Violet) and 5ct Emerald Cabochon (13.34×8.89mm, Green) 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.


4 Ct Tourmaline (Cabochon) 5 Ct Emerald (Cabochon)
11.82×7.88 mm vs 13.34×8.89 mm
76.38 mm²   97.25 mm²
Face-up size outline for 5ct Emerald (13.34×8.89mm, cabochon cut)
Face-up size outline for 4ct Tourmaline (11.82×7.88mm, cabochon cut)
4ct Tourmaline Cabochon (11.82×7.88mm)
5ct Emerald Cabochon (13.34×8.89mm)
Difference: 27% (20.87 mm²)
5ct Emerald (Cabochon, 13.34×8.89mm) has approx. 27% more face-up area than 4ct Tourmaline (Cabochon, 11.82×7.88mm).


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