×
carat vs. color  length*  width*
  ×

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

0.8ct Emerald (Round, 6×6mm, Dark Green) vs 0.3ct Diamond (Round, 4.35×4.35mm, White)


Quick summary: When looked from above (face-up position), 0.8ct Emerald (6×6mm, round cut) appears 90% larger than 0.3ct Diamond (4.35×4.35mm, round cut). See below how they compare side-by-side on a ring and finger.

0.8ct Emerald (round cut)
vs
 0.3ct Diamond (round cut)
dark green
 
white
6×6 mm 4.35×4.35 mm
actual size
Actual size of 0.8ct Emerald (round cut, 6×6mm, Dark Green color)   Actual size of 0.3ct Diamond (round cut, 4.35×4.35mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Green 0.8ct Emerald (round cut, 6×6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.3ct Diamond (round cut, 4.35×4.35mm) 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 26%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.8ct Emerald Round (6×6mm, Dark Green) and 0.3ct Diamond Round (4.35×4.35mm, White) 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, Diamond will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.52 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.


0.8 Ct Emerald (Round) 0.3 Ct Diamond (Round)
6×6 mm vs 4.35×4.35 mm
28.27 mm²   14.86 mm²
Face-up size outline for 0.8ct Emerald (6×6mm, round cut)
Face-up size outline for 0.3ct Diamond (4.35×4.35mm, round cut)
0.8ct Emerald Round (6×6mm)
0.3ct Diamond Round (4.35×4.35mm)
Difference: 90% (13.41 mm²)
0.8ct Emerald (Round, 6×6mm) has approx. 90% more face-up area than 0.3ct Diamond (Round, 4.35×4.35mm).


Popular comparisons: