×
carat vs. color  length*  width*
  ×

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

20ct Peridot (Marquise, 28.42×14.21mm, Yellowish Green) vs 5ct Ruby (Oval, 12.93×8.62mm, Red)


Quick summary: When looked from above (face-up position), 20ct Peridot (28.42×14.21mm, marquise cut) appears 3.1 times larger than 5ct Ruby (12.93×8.62mm, oval cut). See below how they compare side-by-side on a ring and finger.

20ct Peridot (marquise cut)
vs
 5ct Ruby (oval cut)
yellowish green
 
red
28.42×14.21 mm 12.93×8.62 mm
actual size
Actual size of 20ct Peridot (marquise cut, 28.42×14.21mm, Yellowish Green color)   Actual size of 5ct Ruby (oval cut, 12.93×8.62mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Yellowish Green 20ct Peridot (marquise cut, 28.42×14.21mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 5ct Ruby (oval cut, 12.93×8.62mm) 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
 85% vs 52%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 20ct Peridot Marquise (28.42×14.21mm, Yellowish Green) and 5ct Ruby Oval (12.93×8.62mm, Red) 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, Ruby will face-up smaller than Peridot for a given carat weight, because it has higher specific gravity (4 vs. 3.34 - this means it's "heavier" compared to Peridot 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.


20 Ct Peridot (Marquise) 5 Ct Ruby (Oval)
28.42×14.21 mm vs 12.93×8.62 mm
286.73 mm²   91.39 mm²
Face-up size outline for 20ct Peridot (28.42×14.21mm, marquise cut)
Face-up size outline for 5ct Ruby (12.93×8.62mm, oval cut)
20ct Peridot Marquise (28.42×14.21mm)
5ct Ruby Oval (12.93×8.62mm)
Difference: 214% (195.34 mm²)
20ct Peridot (Marquise, 28.42×14.21mm) has approx. 214% more face-up area than 5ct Ruby (Oval, 12.93×8.62mm). In other words, it's 3.14x larger.


Popular comparisons: