×
carat vs. color  length*  width*
  ×

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

20ct Sapphire (Cabochon, 18.57×12.38mm, Blue) vs 10ct Sapphire (Cabochon, 14.75×9.83mm, Blue)


Quick summary: When looked from above (face-up position), 20ct Sapphire (18.57×12.38mm, cabochon cut) appears 59% larger than 10ct Sapphire (14.75×9.83mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

20ct Sapphire (cabochon cut)
vs
 10ct Sapphire (cabochon cut)
blue
 
blue
18.57×12.38 mm 14.75×9.83 mm
actual size
Actual size of 20ct Sapphire (cabochon cut, 18.57×12.38mm, Blue color)   Actual size of 10ct Sapphire (cabochon cut, 14.75×9.83mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 20ct Sapphire (cabochon cut, 18.57×12.38mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Sapphire (cabochon cut, 14.75×9.83mm) 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 59%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 20ct Sapphire Cabochon (18.57×12.38mm, Blue) and 10ct Sapphire Cabochon (14.75×9.83mm, 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

The face-up size depends on the shape of the gem, its weight and 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.


20 Ct Sapphire (Cabochon) 10 Ct Sapphire (Cabochon)
18.57×12.38 mm vs 14.75×9.83 mm
188.52 mm²   118.89 mm²
Face-up size outline for 20ct Sapphire (18.57×12.38mm, cabochon cut)
Face-up size outline for 10ct Sapphire (14.75×9.83mm, cabochon cut)
20ct Sapphire Cabochon (18.57×12.38mm)
10ct Sapphire Cabochon (14.75×9.83mm)
Difference: 59% (69.63 mm²)
20ct Sapphire (Cabochon, 18.57×12.38mm) has approx. 59% more face-up area than 10ct Sapphire (Cabochon, 14.75×9.83mm).


Popular comparisons: