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1.8ct Tourmaline (Emerald, 8.45×6.26mm, Light Red) vs 4.01ct Aquamarine (Oval, 12×9mm, Light Blue)


Quick summary: When looked from above (face-up position), 4.01ct Aquamarine (12×9mm, oval cut) appears 80% larger than 1.8ct Tourmaline (8.45×6.26mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.8ct Tourmaline (emerald cut)
vs
 4.01ct Aquamarine (oval cut)
light red
 
light blue
8.45×6.26 mm 12×9 mm
actual size
Actual size of 1.8ct Tourmaline (emerald cut, 8.45×6.26mm, Light Red color)   Actual size of 4.01ct Aquamarine (oval cut, 12×9mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Red 1.8ct Tourmaline (emerald cut, 8.45×6.26mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 4.01ct Aquamarine (oval cut, 12×9mm) 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
 38% vs 54%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.8ct Tourmaline Emerald (8.45×6.26mm, Light Red) and 4.01ct Aquamarine Oval (12×9mm, Light 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, Tourmaline will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.06 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.


1.8 Ct Tourmaline (Emerald) 4.01 Ct Aquamarine (Oval)
8.45×6.26 mm vs 12×9 mm
49.19 mm²   88.56 mm²
Face-up size outline for 4.01ct Aquamarine (12×9mm, oval cut)
Face-up size outline for 1.8ct Tourmaline (8.45×6.26mm, emerald cut)
1.8ct Tourmaline Emerald (8.45×6.26mm)
4.01ct Aquamarine Oval (12×9mm)
Difference: 80% (39.37 mm²)
4.01ct Aquamarine (Oval, 12×9mm) has approx. 80% more face-up area than 1.8ct Tourmaline (Emerald, 8.45×6.26mm).


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