×
carat vs. color  length*  width*
  ×

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

0.2ct Emerald (Round, 3.99×3.99mm, Green) vs 0.4ct Ruby (Round, 4.4×4.4mm, Red)


Quick summary: When looked from above (face-up position), 0.4ct Ruby (4.4×4.4mm, round cut) appears 22% larger than 0.2ct Emerald (3.99×3.99mm, round cut). See below how they compare side-by-side on a ring and finger.

0.2ct Emerald (round cut)
vs
 0.4ct Ruby (round cut)
green
 
red
3.99×3.99 mm 4.4×4.4 mm
actual size
Actual size of 0.2ct Emerald (round cut, 3.99×3.99mm, Green color)   Actual size of 0.4ct Ruby (round cut, 4.4×4.4mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.2ct Emerald (round cut, 3.99×3.99mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.4ct Ruby (round cut, 4.4×4.4mm) 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
 24% vs 27%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.2ct Emerald Round (3.99×3.99mm, Green) and 0.4ct Ruby Round (4.4×4.4mm, 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 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.


0.2 Ct Emerald (Round) 0.4 Ct Ruby (Round)
3.99×3.99 mm vs 4.4×4.4 mm
12.5 mm²   15.21 mm²
Face-up size outline for 0.4ct Ruby (4.4×4.4mm, round cut)
Face-up size outline for 0.2ct Emerald (3.99×3.99mm, round cut)
0.2ct Emerald Round (3.99×3.99mm)
0.4ct Ruby Round (4.4×4.4mm)
Difference: 22% (2.71 mm²)
0.4ct Ruby (Round, 4.4×4.4mm) has approx. 22% more face-up area than 0.2ct Emerald (Round, 3.99×3.99mm).


Popular comparisons: