×
carat vs. color  length*  width*
  ×

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

1.39ct Diamond (Round, 7.25×7.25mm, White) vs 3.9ct Emerald (Cushion, 10.03×10.03mm, Green)


Quick summary: When looked from above (face-up position), 3.9ct Emerald (10.03×10.03mm, cushion cut) appears 2.2 times larger than 1.39ct Diamond (7.25×7.25mm, round cut). See below how they compare side-by-side on a ring and finger.

1.39ct Diamond (round cut)
vs
 3.9ct Emerald (cushion cut)
white
 
green
7.25×7.25 mm 10.03×10.03 mm
actual size
Actual size of 1.39ct Diamond (round cut, 7.25×7.25mm, White color)   Actual size of 3.9ct Emerald (cushion cut, 10.03×10.03mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.39ct Diamond (round cut, 7.25×7.25mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 3.9ct Emerald (cushion cut, 10.03×10.03mm) 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
 43% vs 60%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.39ct Diamond Round (7.25×7.25mm, White) and 3.9ct Emerald Cushion (10.03×10.03mm, Green) 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.


1.39 Ct Diamond (Round) 3.9 Ct Emerald (Cushion)
7.25×7.25 mm vs 10.03×10.03 mm
41.28 mm²   90.54 mm²
Face-up size outline for 3.9ct Emerald (10.03×10.03mm, cushion cut)
Face-up size outline for 1.39ct Diamond (7.25×7.25mm, round cut)
1.39ct Diamond Round (7.25×7.25mm)
3.9ct Emerald Cushion (10.03×10.03mm)
Difference: 119% (49.26 mm²)
3.9ct Emerald (Cushion, 10.03×10.03mm) has approx. 119% more face-up area than 1.39ct Diamond (Round, 7.25×7.25mm). In other words, it's 2.19x larger.


Popular comparisons: