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10ct Emerald (Oval, 18.57×12.38mm, Green) vs 10ct Sapphire (Oval, 16.29×10.86mm, Blue)


Quick summary: When looked from above (face-up position), 10ct Emerald (18.57×12.38mm, oval cut) appears 30% larger than 10ct Sapphire (16.29×10.86mm, oval cut). See below how they compare side-by-side on a ring and finger.

10ct Emerald (oval cut)
vs
 10ct Sapphire (oval cut)
green
 
blue
18.57×12.38 mm 16.29×10.86 mm
actual size
Actual size of 10ct Emerald (oval cut, 18.57×12.38mm, Green color)   Actual size of 10ct Sapphire (oval cut, 16.29×10.86mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 10ct Emerald (oval cut, 18.57×12.38mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Sapphire (oval cut, 16.29×10.86mm) 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 65%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Emerald Oval (18.57×12.38mm, Green) and 10ct Sapphire Oval (16.29×10.86mm, 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 Emerald for a given carat weight, because it has higher specific gravity (4 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.


10 Ct Emerald (Oval) 10 Ct Sapphire (Oval)
18.57×12.38 mm vs 16.29×10.86 mm
188.52 mm²   145.07 mm²
Face-up size outline for 10ct Emerald (18.57×12.38mm, oval cut)
Face-up size outline for 10ct Sapphire (16.29×10.86mm, oval cut)
10ct Emerald Oval (18.57×12.38mm)
10ct Sapphire Oval (16.29×10.86mm)
Difference: 30% (43.45 mm²)
10ct Emerald (Oval, 18.57×12.38mm) has approx. 30% more face-up area than 10ct Sapphire (Oval, 16.29×10.86mm).


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