×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

1.66ct Sapphire (Oval, 8.96×5.97mm, Blue) vs 40ct Emerald (Emerald, 24.89×18.44mm, Green)


Quick summary: When looked from above (face-up position), 40ct Emerald (24.89×18.44mm, emerald cut) appears 9.7 times larger than 1.66ct Sapphire (8.96×5.97mm, oval cut). See below how they compare side-by-side on a ring and finger.

1.66ct Sapphire (oval cut)
vs
 40ct Emerald (emerald cut)
blue
 
green
8.96×5.97 mm 24.89×18.44 mm
actual size
Actual size of 1.66ct Sapphire (oval cut, 8.96×5.97mm, Blue color)   Actual size of 40ct Emerald (emerald cut, 24.89×18.44mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.66ct Sapphire (oval cut, 8.96×5.97mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 40ct Emerald (emerald cut, 24.89×18.44mm) 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
 36% vs 110%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.66ct Sapphire Oval (8.96×5.97mm, Blue) and 40ct Emerald Emerald (24.89×18.44mm, 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, 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.


1.66 Ct Sapphire (Oval) 40 Ct Emerald (Emerald)
8.96×5.97 mm vs 24.89×18.44 mm
43.86 mm²   426.84 mm²
Face-up size outline for 40ct Emerald (24.89×18.44mm, emerald cut)
Face-up size outline for 1.66ct Sapphire (8.96×5.97mm, oval cut)
1.66ct Sapphire Oval (8.96×5.97mm)
40ct Emerald Emerald (24.89×18.44mm)
Difference: 873% (382.98 mm²)
40ct Emerald (Emerald, 24.89×18.44mm) has approx. 873% more face-up area than 1.66ct Sapphire (Oval, 8.96×5.97mm). In other words, it's 9.73x larger.


Popular comparisons: