×
carat vs. color  length*  width*
  ×

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

1.5ct Ruby (Emerald, 7.3×5.41mm, Red) vs 4.5ct Sapphire (Oval, 12.48×8.32mm, Dark Blue)


Quick summary: When looked from above (face-up position), 4.5ct Sapphire (12.48×8.32mm, oval cut) appears 2.3 times larger than 1.5ct Ruby (7.3×5.41mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.5ct Ruby (emerald cut)
vs
 4.5ct Sapphire (oval cut)
red
 
dark blue
7.3×5.41 mm 12.48×8.32 mm
actual size
Actual size of 1.5ct Ruby (emerald cut, 7.3×5.41mm, Red color)   Actual size of 4.5ct Sapphire (oval cut, 12.48×8.32mm, Dark Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 1.5ct Ruby (emerald cut, 7.3×5.41mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Dark Blue 4.5ct Sapphire (oval cut, 12.48×8.32mm) 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
 33% vs 50%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Ruby Emerald (7.3×5.41mm, Red) and 4.5ct Sapphire Oval (12.48×8.32mm, Dark 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

Ruby and Sapphire have the same specific gravity so their face-up size depends on the weight, shape and 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.


1.5 Ct Ruby (Emerald) 4.5 Ct Sapphire (Oval)
7.3×5.41 mm vs 12.48×8.32 mm
36.73 mm²   85.14 mm²
Face-up size outline for 4.5ct Sapphire (12.48×8.32mm, oval cut)
Face-up size outline for 1.5ct Ruby (7.3×5.41mm, emerald cut)
1.5ct Ruby Emerald (7.3×5.41mm)
4.5ct Sapphire Oval (12.48×8.32mm)
Difference: 132% (48.41 mm²)
4.5ct Sapphire (Oval, 12.48×8.32mm) has approx. 132% more face-up area than 1.5ct Ruby (Emerald, 7.3×5.41mm). In other words, it's 2.32x larger.


Popular comparisons: